Rakhmat Akilov was arrested hours after the massacre on suspicion of murder and terror offences. Photograph: (Reuters)
Rakhmat Akilov is alleged to have confessed in the messages that he 'ran over 10 people in the centre of Stockholm'
Rakhmat Akilov, the alleged attacker of the Sweden truck attack that killed 4 people and injured 15, reportedly exchanged WhatsApp messages with Islamic State supporters before and after the attack, The Independent reports.
According to several media outlets, he is a 39-year-old of Uzbek origin and an IS supporter.
During an interrogation, he reportedly told investigators he was "pleased with what he had done" and had "accomplished what he set out to do", Swedish daily Expressen said.
Akilov also said the "order" for the attack on Drottninggatan came directly from IS in Syria.
In the Whatsapp messages, he is alleged to have confessed that he "ran over 10 people in the centre of Stockholm".
The messages allegedly show Akilov asking his confidant how to manufacture explosives.
Akilov was detained on Friday in Marsta, a suburb north of Stockholm. Swedish police said a man arrested on "suspicion of a terrorist crime" was probably the truck driver.
"We suspect that the man who was arrested is the perpetrator," Stockholm police spokesman Lars Bystrom told AFP.
The attack was the latest in a string of assaults with vehicles in Europe.