Police arrested awoman and her paramour for allegedly killing her daughter in east Delhi's Ghazipur area.
The woman, along with the help of the paramour, killed the minor after she told them that she would inform her father about their illegal affair.
The police were informed around 10 pm yesterday about a six-and-a-half-year-old girl, a class 1 student in a government school, going missing from her house, they said.
After a few hours, the girl's body was found with her throat slit on the terrace of her house, the police said.
During the investigation, it emerged that the girl's mother, in her 30s, had an extra-marital affair, the police said.
Yesterday, the woman's paramour came to meet her when the girl's father was away.Before he came, the woman had already sent her daughter downstairs. The girl returned after sometime only to find the couple in a "compromising position", they said.
She threatened to call her father and inform him.
Enraged, her mother and her paramour, in his 20s, first allegedly rendered her unconscious, the police said.
The autopsy report will clear whether they held her by the neck or gave her some sedative, they added.
They took her to a terrace where they allegedly slit her throat. After they returned, the woman went downstairs and pretended to look for her daughter. She took her younger son to a nearby temple and adjacent lanes to search for the girl, the police said.
Meanwhile, her partner disposed of the blood-stained clothes and hid the knife in the woman's house, they said.
The girl's father informed the police. Later, some residents of the building saw the girl's body on the terrace and alerted the police, they said.
The police questioned the residents of the building and also scanned the call details of the victim's family, the police said.
They developed a suspicion about the girl's mother after they found that she used to speak to a man at odd hours, they said.
The accused, a labourer, was called for questioning and subsequently revealed about his involvement, the police said, adding that the duo has been arrested.