A man was shot and killed early Monday morning at an apartment complex in Neptune, police said.

Authorities identified the victim as Mark Ruffin Sr., 41 of Lakewood.

Police said Neptune Township Police Department received multiple 911 calls around 12:30 a.m. reporting shots fired in the Jumping Brook Apartments West located on State Highway 33.

At the complex, officers found Ruffin lying on the ground, suffering from a gunshot wound. The officers immediately began rendering first aid while awaiting the arrival of medical personnel. Officials said the victim was then taken to Jersey Shore University Medical Center in Neptune, where he was pronounced dead at 2:47 a.m.

The Monmouth County Prosecutor's Office was contacted and a joint investigation with the Neptune Township Police Department was launched into Ruffin’s death. As of Tuesday morning, no arrests had been made. Police said the investigation is active and ongoing.

Anyone with information about the homicide is asked to contact Detective Erick Amadruto of the Neptune Township Police Department at 732-988-8000, extension 419 or Detective Kevin Condon of the Monmouth County Prosecutor's Office at 800-533-7443.

Anyone who feels the need to remain anonymous - but has information about a crime - can contact Monmouth County Crime Stoppers confidential telephone tip-line by calling 1-800-671-4400, texting "MONMOUTH” plus the tip to 274637 or emailing a tip via www.monmouthcountycrimestoppers.com.

Monmouth County Crime Stoppers will pay up to $5,000 for information leading to the arrest of criminals and fugitives.