Rampur: A 17-year-old boy hacked his sister to death after a heated argument between the two over her illicit relationship in Ganj locality here, police said on Thursday.
Shiva's 19-year-old married sister had apparently started talking to her ex-lover over phone after coming to her parents' home, they said.
The accused saw her conversing with her paramour and in a fit of rage killed her with knife, police said.
He was sent to a juvenile home in Moradabad on Wednesday following the order of Rampur Juvenile Court, district police chief Sadhna Goswami said.
In a similar case, a 25-year-old married woman killed her paramour and his wife in Safini area here as she was upset over his marriage with the other woman.
The incident occurred on Tuesday when the accused slit the throat of her paramour's wife and poisoned him to death, additional S P Tariq Mohammad said.
The S P said the deceased was involved in an illicit relationship with a married woman and started staying with her along with his wife.
A case has been registered against the woman, her son and two daughters, he said, adding the four were sent to jail yesterday.
