A 22-year-old woman who apparently was abducted near Triangle was found early yesterday gagged and tied to a tree in a wooded area near Great Falls Park, Fairfax County police reported.

They said the woman, whose name was not released, was found about 7:30 a.m. by a county police officer investigating reports from residents along Georgetown Pike near the Difficult Run bridge that they had heard a woman screaming.

Fairfax police Sgt. Bob Fitzpatrick said the woman had been struck on the head but that cuts and abrasions she received were not life-threatening. He said she was treated at Fairfax Hospital, but hospital officials would not release any information about the woman last night.

Details about the woman's abduction were sketchy. Fitzpatrick said the woman, who lives in Triangle, apparently was taken sometime Friday night by three women from the Hop In convenience store at 300 Graham Park Rd. in Triangle.

Fitzpatrick said the woman's abductors "presumably drove her to the [Fairfax County] location" from Triangle, which is near the Quantico Marine Corps base in southern Prince William County.

He said police had not determined the time of the woman's abduction or a possible motive.

Debbie Bartley, manager of the Triangle Hop In store, said last night that she found "a blue velour shirt in the parking lot Friday night that was all ripped up over by the side wall [of the store], and I thought it was kind of strange."

But she said neither she nor store employes working that night noticed anything else unusual.