A military man who lived in a Fairfax County apartment where the bodies of a woman and an infant were discovered last weekend was declared absent without leave yesterday after he failed to report for work at the Pentagon, Army spokesmen said.

Staff Sgt. Terry Lee Simmons, assigned to the Army's deputy chief of staff for operations, had been on leave since Aug. 1. His leave was scheduled to expire Monday, but Simmons reportedly telephoned his office Monday, saying he would be late, said Army spokesman Courtenay S. Welton.

Welton said Simmons was last in his office at the Pentagon on July 31, and that and that he did not know where Simmons was.

Virginia Deputy Chief Medical Examiner Dr. James C. Byer began an autopsy on the two bodies, which were discovered after a neighbor noticed flies covering the window of Apartment 101 at 3606 Barcroftview Ter., off Columbia Pike. Byer said results of the autopsy may be available later this week.

Police said yesterday they remain unsure of the identity, age, and cause of death of the woman and the infant -- whose sex was not yet determined -- because of the length of time they had been dead before their bodies were discovered.

Fairfax police spokesman Warren Carmichael, declining to release any details of the investigation, said it will be several days before the bodies are identified.

Neighbors and officials at the apartment building said the apartment was rented to Simmons and Caroline H. Yoo. The neighbors said that Yoo, a Korean native, has a5-month old daughter, Julie.