Two Army enlisted men were charged yesterday with murder in the stabbing death of an unidentified hitchhiker whom police said they had picked up on the Fort Belvoir military base Tuesday night.

The body of a man who had suffered multiple stab wounds on his upper body was noticed about 8 a.m. yesterday by a school bus driver in the 4200 block of Buckman Road near Fort Belvoir, according to police. The body was lying in underbrush near an abandoned house.

The arrests came after two patrolmen assigned to the county police station at Groveton remembered stopping two men in a car Tuesday night after observing their vehicle weaving on the highway about a mile from where the body was later found.

The car's driver, Bernardo M. Romero, 22, of Fort Riley, Kan., was charged with driving while intoxicated, according to police, and a passenger, Army E5 Robert L. McDaniel, 22, of Fort Belvoir, was charged with being drunk in public. Police said that at the time of their arrest they noticed that both men had blood on their clothing.

Both men were arrested yesterday on murder charges and held under $100,000 bond each.

Investigators said they believe that the two men picked up the hitchhiker sometime Tuesday evening, rode around drinking heavily and later became involved in an argument at the abandoned house on Buckman Road, where they stabbed the hitchhiker and left his body in underbrush.

The hitchhiker's identity was still unknown last night.