NEW DELHI, April 19 -- The daytime murder of a 17-year-old boy in northeast Delhi's Seelampur on Thursday snowballed into a late night protest by the teen's family and neighbours, leading to the deployment of security forces in the area and interventions by the state's top political leaders.

Police said Kunal (who went by one name) was killed in a revenge attack, alluding to an earlier altercation between an associate of his and one of the suspects, as they arrested a woman who allegedly led the gang of boys behind the murder.

The victim's mother said he was waylaid and stabbed multiple times by the accused in the J-block market of the locality, around 50m from their home, at around 6pm. "My husband ran towards the street where Kunal wa...