The body of a 17-year-old girl with her throat slit was found at her friend's house in northwest Delhi's Shalimar Bagh area on Saturday, police said.
The minor girl, a resident of the same area, was missing since Friday evening, they added.
The victim's family had approached police on the intervening night of Friday and Saturday and a case was filed, a senior officer said.
During investigation, it was learnt that the girl was last seen with Sunny, a friend of hers, he said.
Officials then reached Sunny's house and found it locked. They broke in and discovered the body inside, Aslam Khan, Deputy Commissioner of Police (northwest), said.
A case was registered in this connection, police said, adding that Sunny was absconding.
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