The body of a 26-year-old woman custodial worker who had been shot repeatedly was found yesterday in a locked room at the Washington Navy Yard authorities reported.

The woman, identified as Jane Marbley of Spring Road NW, had last been seen on Monday and had apparently been dead for some time.

Police said last night that they had no suspects and no motive in the death.

The victim's body, clad in the clothes she wore as a custodian employed at the Navy Yard by the General Services Administration, was found about 11 a.m. in a room in Building 160, a partially vacant office and laboratory structure.

The room was empty except for the victim's body, which was lying on its back. Investigators said Marbley had suffered "multiple gunshot wounds in the upper body."

It was not immediately determined when the shooting occurred. Marbley's normal shift was from 11:30 a.m. to 8 p.m., officials said, and access to the building is restricted after 6 p.m.

Reportedly Marbley was last seen Monday by a coworker. She subsequently was reported missing to police.

Marbley was married and the mother of two sons, aged four and nine. Her husband, Harlan, works as a counselor for the city's Department of Human Resources. She was a Washington native.