Off-duty cop shoots dead man armed with BB gun after confrontation outside Staten Island diner

A man with a significant mental health history armed with a realistic-looking BB gun was fatally shot by an off-duty police officer outside a popular Staten Island diner on Friday night, according to sources and the NYPD.

Bullets flew just after 8 p.m. at the well-known Andrew’s Diner on Hylan Boulevard in Eltingville, according to the NYPD.

Diners alerted cops that a man with a gun was menacing the eatery, according to sources.

The gun-wielding man —  whom sources identified as Jesse Campbell, 44 — then had a confrontation with two off-duty NYPD officers outside the diner, during which he pointed the supposed weapon at them, according to sources.

Police have not yet confirmed the man’s name.

During the confrontation, one of the off-duty officers, a female detective with the Internal Affairs Bureau, fired multiple rounds at the suspect, striking him throughout the body, according to the NYPD and sources.

Police have a video that showed off-duty officers giving Campbell instructions to drop the gun before the fatal shooting, according to sources.

Campbell was taken to Staten Island University Hospital, where he was pronounced dead, sources said.

Campbell had “significant” mental health issues, sources said, adding that he had allegedly told his mother and sister earlier in the day that he intended to be killed by police.

“It looks like suicide by cop,” a police source said.

A hyper-realistic BB gun was recovered at the scene, according to sources and the NYPD.