New Delhi police said Yusra "Binoo" Khan, 17, was killed and her mother, Sadmani, 40, was injured after the younger Khan confronted a man living in the same building for urinating near the gate to their home Thursday night.
The man told the girl he would return -- and he did, with a pistol, killing her, police said.
The man fled the scene and police have not yet located him, the BBC said.
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