A D.C. police officer shot and killed a 21-year-old Southeast Washington man early yesterday, police reported, after the officer caught him robbing a Northeast Washington fast food restaurant and the man turned as if to fire on the officer.

Police said Sixth District officers William H. Scoble, 31, and Antonio B. Duvall, 28, entered the McDonald's at 4301 Nannie Helen Burroughs Ave. NE shortly after 2:30 a.m., just as two men -- one armed with a pistol -- were about to leave. Scoble was armed with a service shotgun, police said.

The two had just taken an undetermined amount of money from a cashier, police said. The officers ordered the men to halt, but the armed man turned as if to fire on them, police said. Scoble fired one shot from the shotgun, striking the armed man in the upper bopdy. The armed other man fled.

The victim, identified as Shelton M. Williams, 1528 18th St. SE, was taken to D.C. General Hospital and pronounced dead at 8:28 a.m. Scoble has been placed on administrative leave with pay pending the outcome of an internal investigation and a presentation of the findings to a grand jury.