The assistant manager of a McDonald's restaurant in far Northeast Washington was shot to death last night after two holdup men forced him to turn over money from an office safe, D.C. police reported.

The killing was the second in less than two months of an employe of the restaurant at 4301 Nannie Helen Burroughs Ave. On Jan 19, a security guard was slain there when a holdup man fired a sawed-off shotgun point-blank into his face.

Last night's victim, who was not identified until his family can be told, was shot once in the back of the head, apparently after he had complied fully with the robbers' demands. He was pronounced dead on the scene.

Police said the two men, both armed with pistols, burst into the restaurant about 11 p.m., and immediately vaulted over the service counter.

While one held several employes and customers at gunpoint, the second took a nightstick from an otherwise unarmed security guard, then forced the guard and the assistant manager into the office.

After collecting an undetermined amount of money in a shopping bag, the gunman fired one shot at the victim, and the pair then fled.

In the Jan. 19 incident, security guard Michael Crennell, 36, was also killed without apparent provocation.

Crennell had been standing behind the counter, obscured from view, when two gummen entered about 11:30 p.m. and ordered employes and customers to lie on the floor. One of the men began grabbing money from cash drawers while the second went behind the counter into the kitchen area. There he encountered Crennell and fired a sawed-off shotgun into his face.

The guard was armed with a revolver, but did not draw it, police reports said.

Within minutes of the slaying, police stopped the robbers' getaway car after a high-speed chase and arrested three men who were later charged in Crennell's slaying.