It happened around 2 a.m. on the White Horse Pike in Atco.
The New Jersey Attorney General's Office says a man was hit by a Waterford Police Department vehicle being driven by an on-duty officer.
The man who was struck was pronounced dead on the scene at 2:19 a.m.
Neither the name of the man killed, nor the name of the officer involved, have been released.
The state AG's office says it investigates any time a death occurs during an encounter with a police officer "acting in the officer's official capacity."