Authorities recovered a loaded .45-caliber pistol near the body of Christopher Clark, 26, after he was shot on 16th Avenue around 1 a.m., state Attorney General Gurbir S. Grewal said.
Sheriff's officers were assisting city police on a report of shots fired, authorities said.
Officers conducted CPR, but Clark was pronounced dead at the scene about a half hour later, they said.
Three police officers were taken to the hospital.
State Attorney General Gurbir S. Grewal said the state Integrity Bureau within the Office of Public Integrity and Accountability and the New Jersey State Police Homicide Unit were investigating the incident, which is standard practice when a death occurs during an encounter with a law enforcement officer.
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