NYPD detectives were interviewing the combative mother of a 16-year-old girl found shot in the head inside their Lower East Side home as they track a man seen fleeing the scene, police sources said Friday.

Cops interviewed the mom on Friday as the teenage girl recovered at Bellevue Hospital .

Both were in the apartment on Stanton St. near Ridge St. around 3:30 p.m. Thursday when a gun was brandished and the teen was shot in the head.

It was not immediately clear what sparked the shooting. The apartment remained a cordoned-off crime scene on Friday.

Building residents said at least nine people live in the apartment, including four women and five children. The oldest child is about 16, the youngest just 1.

Police sources said that the mom called 911, but was then “highly uncooperati

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