An off-duty NYPD officer is reportedly in custody after fatally shooting a man on Long Island Tuesday night.

According to the Nassau County Police Department, officers discovered a 25-year-old man with fatal gunshot wounds outside a home on Langdon Road in Farmingdale at around 8 p.m.

Neither the victim nor alleged shooter have been publicly identified.

Multiple Long Island news outlets are reporting that the suspect is an off-duty police officer with the NYPD. The officer had an “ongoing dispute” with the victim, who did not appear to be armed, according to officials who spoke with ABC-7.

A source tells the Daily News that the officer was assigned to a precinct in Queens after graduating from the police academy a few months ago.

According to the News, the unnamed suspect was “hanging out with a few friends when two of them started fighting. He shot one of his friends to prevent him from harming the other, the source said.”

The alleged shooter then returned home and told his father what had happened, the source added.

A spokesperson with Nassau County Police Department, which is handling the investigation, declined to shared details about the suspect.

“We were told not to confirm employment,” a public information officer told Gothamist, directing further questions to the NYPD.

A spokesperson for the NYPD said they had no information about the shooting. According to data made public in 2016 following a lawsuit, approximately a quarter of all NYPD officers reside on Long Island.

We’ll update as more information becomes available.