Metro

Cop shot cop

A Triborough Bridge and Tunnel Authority officer’s gun accidentally discharged a round that sent a colleague to the hospital today, a source said.

The injured officer suffered a stomach wound during the 3 p.m. mishap inside the service building of the RFK Bridge and was in stable condition, a source said.

The officer was taking her gun out of her locker when it accidentally went off, according to the source.

A bullet shot into the locker and a slice of metal — either a bullet fragment or piece of locker shrapnel — ricocheted back and hit the other cop, the source added.

The NYPD is investigating the shooting.