A Fairfax County man allegedly abducted his ex-girlfriend at gunpoint late Monday, shot at her several times before releasing her unharmed, and then led police on a car chase before he finally was arrested, police said yesterday.

Thomas P. Herndon, 24, of 10705 Oak Pl., was charged with abduction, attempted murder, the use of a firearm in the commission of a felony, and several traffic violations that included striking two police cruisers with his car. Herndon was finally apprehended on Waples Mills Road shortly after he wrecked his car while allegedly trying to elude police.

Police said the incident began when Herndon allegedly forced his way inside an apartment at 2566 Chain Bridge Rd. and abducted 18-year-old Kim Dianne Thomas, of the 4100 block of Bixby Court of Chantilly. Police said Herndon, armed with two guns, drove Thomas to a remote area near Lawyers Road where he allegedly struck her and shot at her several times without wounding her.

According to police, Herndon later drove his victim to the Fox Mill Shopping Center and called the Chain Bridge Road apartment, allegedly threatening to kill Thomas and any police who interfered. Police spokesmen said Herndon released Thomas near Rte. 50 and West Ox Road, where she subsequently called police from a store.

Police cruisers spotted Herndon in the area and "a high speed chase up and down Rte. 50 in excess of 80 mph" ensued, police said. Herndon, who was uninjured in the incident, was being held yesterday in the Fairfax jail in lieu of $25,000 bond.