The juvenile was tracked down with the help of the mobile phone of the deceased, which he had taken away after the incident which took place on January 2, DCP (southwest) R A Sanjeev said today.
During interrogation, it emerged that the juvenile was in an inebriated state and had an argument with the victim, Ajay Kalra, before he allegedly hit him on his head with a stone, said police.
However, the cause of the argument -- and hence the motive behind the murder -- could not be ascertained.
The juvenile, who went absconding after the incident, was apprehended yesterday from Ranhola area by a police team, Sanjeev added.