As the probe into the Crimea college shooting continues, details are emerging about the personal life of the teenage gunman who killed 20 people before killing himself.

Here's what has been reported about 18-year-old Vladislav Roslyakov so far:

Family life 
Roslyakov's parents separated when he was around 10 because his father drank heavily, his grandmother Taisiya Roslyakova told the Komsomolskaya Pravda tabloid.&nbsp;

But he continued to see his father on occasion.&nbsp;

His mother works as a low-paid orderly in a cancer out-patient department, according to Russian television.

She is a Jehovah's Witness, reported Kommersant daily, a religious group that is banned from operating in Russia and treated as a harmful sect.

RBK daily quoted a colleague as saying his mother Galina is a "good person" and pleasant to everyone at work. On the day of the killings, she was at work and helped treat victims.

The online news channel Mash said that his mother had told the investigation her son had watched videos of school shootings in the days ahead of the attack.

After learning of the attack, his mother was "grief-stricken" while his father was "baffled," Crimea rights ombudswoman Lyudmila Lubina told RIA Novosti state news agency.

'Withdrawn'

His grandmother said the boy she called "Vladik" was "kind and helpful" but said that as he grew up he became "reserved and withdrawn."

His girlfriend, named as 15-year-old school student Zlata also told RT state television that he was "kind" and "helped me when things were going badly."

But she said when they first met he was "very repressed and distrustful."

Desire for revenge

His former girlfriend said he told her that he wanted to take revenge on classmates who "humiliated" him and that "he said he didn't want to live because of this."

She said that when they broke up, he told her not to contact him and blacklisted her online.

A friend told RBK daily that Roslyakov hated the college and the "evil teachers" and hinted he would taken revenge on them.

He once sprayed pepper spray in a classroom at the college, an unnamed classmate told Komsomolskaya Pravda.

Interest in weapons

His hobby was Airsoft, a team game involving shooting opponents with replica airguns, an "informed" source told Interfax news agency.

He also "knew chemistry well and it's thought he made explosives himself using ammonium nitrate," the source added.&nbsp;

Roslyakov was in the fourth year of a course to become an electrician, to work on equipment for industrial and domestic use.

Security camera video published by Ren-TV showed him on Monday buying 150 bullets for his gun, after presenting a licence issued last month.&nbsp;

In Russia, application for a gun licence involves studying marksmanship and being ruled mentally healthy. It is a relatively costly process.&nbsp;

An instructor confirmed to the newspaper Moskovsky Komsomolets that Roslyakov had taken a short course to get a licence.

Planned attack

Roslyakov arrived at the college while everyone was in classes, taking a back entrance and getting changed in a toilet that was closed for repairs, Mash reported, posting some security camera images.

Shortly before the attack, Roslyakov deleted his social media account, an unnamed classmate told Komsomolskaya Pravda, saying he had tried to contact him after he didn't attend classes from Monday.

Crimea rights ombudswoman Lubina told RIA Novosti that "he professionally cleared his data from his computer."

The carefully planned attack has led some officials to suggest Roslyakov could not have acted alone.

As the probe into the Crimea college shooting continues, details are emerging about the personal life of the teenage gunman who killed 20 people before killing himself.

As the probe into the Crimea college shooting continues, details are emerging about the personal life of the teenage gunman who killed 20 people before killing himself. Here's what has been reported about 18-year-old Vladislav Roslyakov so far: Family life Roslyakov's parents separated when he was around 10 because his father drank heavily, his grandmother Taisiya Roslyakova told the Komsomolskaya Pravda tabloid. But he continued to see his father on occasion. His mother works as a low-paid orderly in a cancer out-patient department, according to Russian television. She is a Jehovah's Witness, reported Kommersant daily, a religious group that is banned from operating in Russia and treated as a harmful sect. RBK daily quoted a colleague as saying his mother Galina is a "good person" and pleasant to everyone at work. On the day of the killings, she was at work and helped treat victims. The online news channel Mash said that his mother had told the investigation her son had watched videos of school shootings in the days ahead of the attack. After learning of the attack, his mother was "grief-stricken" while his father was "baffled," Crimea rights ombudswoman Lyudmila Lubina told RIA Novosti state news agency. 'Withdrawn' His grandmother said the boy she called "Vladik" was "kind and helpful" but said that as he grew up he became "reserved and withdrawn." His girlfriend, named as 15-year-old school student Zlata also told RT state television that he was "kind" and "helped me when things were going badly." But she said when they first met he was "very repressed and distrustful." Desire for revenge His former girlfriend said he told her that he wanted to take revenge on classmates who "humiliated" him and that "he said he didn't want to live because of this." She said that when they broke up, he told her not to contact him and blacklisted her online. A friend told RBK daily that Roslyakov hated the college and the "evil teachers" and hinted he would taken revenge on them. He once sprayed pepper spray in a classroom at the college, an unnamed classmate told Komsomolskaya Pravda. Interest in weapons His hobby was Airsoft, a team game involving shooting opponents with replica airguns, an "informed" source told Interfax news agency. He also "knew chemistry well and it's thought he made explosives himself using ammonium nitrate," the source added. Roslyakov was in the fourth year of a course to become an electrician, to work on equipment for industrial and domestic use. Security camera video published by Ren-TV showed him on Monday buying 150 bullets for his gun, after presenting a licence issued last month. In Russia, application for a gun licence involves studying marksmanship and being ruled mentally healthy. It is a relatively costly process. An instructor confirmed to the newspaper Moskovsky Komsomolets that Roslyakov had taken a short course to get a licence. Planned attack Roslyakov arrived at the college while everyone was in classes, taking a back entrance and getting changed in a toilet that was closed for repairs, Mash reported, posting some security camera images. Shortly before the attack, Roslyakov deleted his social media account, an unnamed classmate told Komsomolskaya Pravda, saying he had tried to contact him after he didn't attend classes from Monday. Crimea rights ombudswoman Lubina told RIA Novosti that "he professionally cleared his data from his computer." The carefully planned attack has led some officials to suggest Roslyakov could not have acted alone.

What we know about the Crimea gunman so far

Students in the Crimean college where at least 17 people died on Wednesday said they heard shooting and chaos as students fled from a gunman or multiple gunmen in the building.

<a href="http://www.wionews.com/world/ten-dead-in-gas-blast-at-crimean-college-reports-171933">Also Read:&nbsp;Death toll rises in Crimea college blast</a>

"I was at a class when I heard shooting on the first floor," said one student in the Kerch Polytechnical College on the Crimean peninsula, who asked not to by identified.

"When we all ran out into the corridor, there were others running and shouting that some guy with a machine gun was randomly shooting everyone in turn," the student told AFP.

Crimea's regional leader Sergei Aksyonov said the perpetrator of the attack was a 22-year-old student in the school who lives in Kerch and shot himself afterwards.

Investigators, however, identified the attacker as 18-year-old Vladislav Roslyakov, a fourth-year student whose body was found "with a gunshot wound" on the premises.

The nature of the attack remained unclear after Russia's National Anti-Terrorism Committee said that there was an explosion and investigators initially said an "unidentified explosive device" had gone off.&nbsp;

Witnesses said that they heard an explosion as well as shots.

"Then a strong explosion went off, but thank God, I was already outside and saw our guys being thrown out of the windows by the explosive wave," said the student.

"There's a lot of them, the ambulances did not have enough stretchers," he said, adding that more bodies could be buried under the rubble from a part of the building that collapsed.

Another student, Semyon Gavrilov, told the Komsomolskaya Pravda newspaper that he saw "a young man with a gun walking around shooting everybody" and hid in a classroom.&nbsp;

"After 10 minutes police with automatic rifles arrived," he said. "I don't know what happened to the shooter."

The college's head Olga Grebennikova told local website Kerch. TV that she was called away on business and came back to the school to witness complete chaos, including reports of multiple shooters.

"They blew up the corridor, they ran around, throwing explosives, ran around with automatic rifles, opening classes and killing anybody they could find," she said sobbing.

At least 17 people were killed in the college, with dozens more injured.

Students in the Crimean college where at least 17 people died on Wednesday said they heard shooting and chaos as students fled from a gunman or multiple gunmen in the building.

Students in the Crimean college where at least 17 people died on Wednesday said they heard shooting and chaos as students fled from a gunman or multiple gunmen in the building. Also Read: Death toll rises in Crimea college blast "I was at a class when I heard shooting on the first floor," said one student in the Kerch Polytechnical College on the Crimean peninsula, who asked not to by identified. "When we all ran out into the corridor, there were others running and shouting that some guy with a machine gun was randomly shooting everyone in turn," the student told AFP. Crimea's regional leader Sergei Aksyonov said the perpetrator of the attack was a 22-year-old student in the school who lives in Kerch and shot himself afterwards. Investigators, however, identified the attacker as 18-year-old Vladislav Roslyakov, a fourth-year student whose body was found "with a gunshot wound" on the premises. The nature of the attack remained unclear after Russia's National Anti-Terrorism Committee said that there was an explosion and investigators initially said an "unidentified explosive device" had gone off. Witnesses said that they heard an explosion as well as shots. "Then a strong explosion went off, but thank God, I was already outside and saw our guys being thrown out of the windows by the explosive wave," said the student. "There's a lot of them, the ambulances did not have enough stretchers," he said, adding that more bodies could be buried under the rubble from a part of the building that collapsed. Another student, Semyon Gavrilov, told the Komsomolskaya Pravda newspaper that he saw "a young man with a gun walking around shooting everybody" and hid in a classroom. "After 10 minutes police with automatic rifles arrived," he said. "I don't know what happened to the shooter." The college's head Olga Grebennikova told local website Kerch. TV that she was called away on business and came back to the school to witness complete chaos, including reports of multiple shooters. "They blew up the corridor, they ran around, throwing explosives, ran around with automatic rifles, opening classes and killing anybody they could find," she said sobbing. At least 17 people were killed in the college, with dozens more injured.

22-year-old Crimean student shoots 17 students, kills himself later

The teenager who killed at least <a href="http://www.wionews.com/central-asia/22-year-old-crimean-student-shoots-17-students-kills-himself-later-172044">20 people and himself</a> in a school massacre that has rocked Russian-annexed Crimea had spoken about taking revenge for bullying, his ex-girlfriend told Russian media on Thursday.

"He would say that he lost trust in people when his classmates began humiliating him for not being like everyone else," a 15-year-old named as Zlata told the Kremlin-funded RT television of Vladislav Roslyakov.

"Vladislav was always telling me about his frequent fights with people around him," she said.

The 18-year-old had spoken to her about taking revenge for this bullying, RT reported Zlata as saying.

"He didn't want to live" because of it, said the girl, who broke up with Roslyakov at an unspecified time before the killing.

She said Roslyakov was a shooting enthusiast whose favourite type of knife was the "butterfly".&nbsp;

But she also described him as a good person.&nbsp;

"When we started going out, everything was fine. He was kind and considerate, he helped me when things were bad.

"I'm sorry for the people he shot and I'm very sorry that he killed himself. He was a very good friend."

Russian investigators and residents of the peninsula are looking to understand what motivated the killer and how he was able to carry out a massacre of this scale.

The teenager who killed at least 20 people and himself in a school massacre that has rocked Russian-annexed Crimea had spoken about taking revenge for bullying, his ex-girlfriend told Russian media on Thursday.

The teenager who killed at least 20 people and himself in a school massacre that has rocked Russian-annexed Crimea had spoken about taking revenge for bullying, his ex-girlfriend told Russian media on Thursday. "He would say that he lost trust in people when his classmates began humiliating him for not being like everyone else," a 15-year-old named as Zlata told the Kremlin-funded RT television of Vladislav Roslyakov. "Vladislav was always telling me about his frequent fights with people around him," she said. The 18-year-old had spoken to her about taking revenge for this bullying, RT reported Zlata as saying. "He didn't want to live" because of it, said the girl, who broke up with Roslyakov at an unspecified time before the killing. She said Roslyakov was a shooting enthusiast whose favourite type of knife was the "butterfly". But she also described him as a good person. "When we started going out, everything was fine. He was kind and considerate, he helped me when things were bad. "I'm sorry for the people he shot and I'm very sorry that he killed himself. He was a very good friend." Russian investigators and residents of the peninsula are looking to understand what motivated the killer and how he was able to carry out a massacre of this scale.

Crimea gunman was 'bullied': Ex-girlfriend to Russian media

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What we know about the Crimea gunman so far

22-year-old Crimean student shoots 17 students, kills himself later

Crimea gunman was 'bullied': Ex-girlfriend to Russian media