Montgomery County police arrested a 31-year-old Laurel man yesterday and charged him with kidnaping his former girl friend and holding her hostage for three days.

Police said the abduction occurred Saturday afternoon as a 23-year-old Edgewater woman and a male companion were getting out of a car to visit a friend in Wheaton.

As the couple walked from the car, someone approached them from behind and struck the man with a blunt object, knocking him to the ground, police said. The woman, according to police, was then dragged into the abductor's car, which sped away.

Police would not identify the woman or her companion.

Acting on information provided by friends of the Edgewater woman, county police, with the aid of the FBI, issued a warrant for the arrest of William Lee Frietag on charges of aggravated assault and kidnaping.

The Prince George's County police located a 1977 gold Camaro matching the description of a car owned by Frietag, at a Best Western Motel on Rte. 193 and Rte. 1 in College Park yesterday afternoon.

The FBI and county police from Prince George's and Montgomery arrested Frietag as he and the woman were leaving the hotel about 1:45 p.m., police said. Police reported that a handgun was found in the hotel room that the two had occupied.

The woman was uninjured, except for minor bruises she received at the time of the abduction, police said. She was being kept in protective custody yesterday, and Frietag was being held in the Montgomery County Detention Center.