The nude body of a 40-year-old woman who had been strangled was found in the back seat of her car in the long-term parking lot at Dulles International Airport Sunday afternoon, FBI officials said yesterday.

The woman, Susan Davoudlarian of 8808 Aunt Lilly La., Annandale, had been reported missing by her husband June 5, said FBI Special Agent Lizzie P. Cassell.

The badly decomposed body was found about 2 p.m. Sunday wrapped in a blanket in her car, which was parked in the airport's long-term lot, police said. Police sources said they believe the woman may have been killed at another location the day she disappeared and then transported to the airport lot.

No arrests have been made, Cassell said. The investigation is being conducted by the Alexandria office of the FBI because the airport is located on federally owned property. Fairfax County Police are assisting and will take over the full investigation if it is determined that the slaying took place off the airport grounds.

The woman's husband, identified by police as David K. Davoudlarian, a gynecologist, told authorities his wife was last seen in their house the morning of June 4, according to Fairfax police spokesman Warren Carmichael, adding "he said there was no reason for her to leave."

Police and FBI officials would not say how the body was discovered in the airport parking lot.

Northern Virginia Deputy Chief Medical Examiner James Beyer ruled yesterday that Mrs. Davoudlarian died as a result of strangulation. Police said marks were found on the woman's neck.