An NYPD officer was shot at and injured in Brooklyn on Monday when an alleged murder suspect with a shotgun returned to the scene and opened fire, according to two law enforcement sources familiar with the situation.

Officer Sharjeel Waris, 25, was on the scene of a homicide that unfolded earlier in the morning in Brownsville when the alleged shooter opened a door from a first floor apartment and opened fire with a shotgun around 7:45 a.m., police said.