A Fairfax County police officer shot and killed a man Wednesday night as police tried to break up a fight at a homeless shelter near Fort Belvoir.

About 6 p.m., officers responded to a report of a fight outside the Eleanor Kennedy Shelter in the 9100 block of Richmond Highway. Finding a melee, they immediately tried to break it up, said Officer Eddy Azcarate, a police spokesman.

As at least two officers intervened, a man who was fighting turned and assaulted one of them.

An officer fired a service weapon and fatally wounded the man. Authorities took the man to a hospital, where he was pronounced dead, Azcarate said.

One officer received injuries that were not believed to be life-threatening.

Officials did not identify the man who was killed and did not say whether had been staying at the shelter. Police declined to identify the officers involved.

The department’s Criminal Investigations Bureau and an Internal Affairs unit are investigating the incident, Azcarate said.