A 40-year-old Germantown woman was kidnaped at the Potomac Village Shopping Center at about 6 p.m. Monday by a man who unsuccessfully sought to collect a $10,000 ransom before he was captured four hours later, Montgomery County police said yesterday.

The extortion plot ended in the District of Columbia, according to police, when the victim's car was spotted in the 1600 block of First Street SW, following an areawide appeal by Montgomery police, who had been called by the victim's husband.

Police arrested Kehinde O. Adebesin, 21, of 101 G St. SW, after he tried to flee from the back seat of the woman's Cadillac. They said he apparently had been directing the woman to drive around the city, during which time she placed two calls from telephone booths to her husband to relay the ransom demand.

Police said the suspect apparently picked the woman at random as she walked to her car after grocery shopping and, using a gun, forced her into her car. Police said the woman and her captor drove to the District and placed the ransom calls, one from the waterfront area and the other from Independence Avenue. At one point, Montgomery police said, the suspect threatened the woman's life.

Montgomery police said when the victim pulled her car to the curb after a signal from the police, a man who had been in the back seat tried to escape on foot. He was arrested by D.C. police after a brief scuffle. Montgomery police said a gun was found on the floor in the back of the car.

Adebesin, who was charged by D.C. police as a fugitive, was ordered held in D.C. Jail on a $10,000 bond. An extradition hearing was set for Jan. 19 to return him to Montgomery where he faces kidnaping and robbery charges, police said.

Police said the woman returned home after giving a statement to police early yesterday. The FBI participated in the investigation along with police from the District and Montgomery County.