BUFFALO, N.Y. (AP) — The man suspected of killing abortion doctor Barnett Slepian in a 1998 sniper attack has been arrested in France, prosecutors said Thursday.

James Kopp, 46, was one of the FBI's most wanted fugitives. There also was an arrest warrant pending for him in a shooting in Canada.

Erie County District Attorney Frank J. Clark said FBI officials informed him of the arrest Thursday morning but he had no other details.

"My first (reaction) was relief, and I guess the second was vindication for all those who said we'd never get him," Clark said. "I never for a moment thought that he would not be captured. To me, it was a question of when."

"I felt greatly relieved because I think this area cries for justice," Clark added. "And, quite frankly, I let out a little 'whoopee,' too."

In France, police sources said Kopp was arrested Thursday afternoon in Dinan, a town in the Brittany region in northwestern France. Police followed him for several days before apprehending him.

The 52-year-old Slepian, just back from synagogue, was heating soup in his suburban Amherst home in October 1998 when he was gunned down with a single shot through a window.

Kopp, of St. Albans, Vt., was the subject of an international manhunt the following month.

Nicknamed the "Atomic Dog" in anti-abortion circles, Kopp had been arrested in several states since 1990 for protesting abortion. His car was spotted in Slepian's neighborhood in the weeks before the shooting, and was found abandoned at Newark International Airport in December 1998, authorities said.

He was formally charged the following May in state and federal complaints with second-degree murder and with violating the Freedom of Access to Clinic Entrances Act by using deadly force against an abortion doctor.

Both charges carry a penalty of up to life in prison. The federal charge also carries a fine of up to $250,000.

Investigators said at the time that the discovery of a scope-equipped rifle buried near the Slepian home a few months after the shooting represented a major breakthrough. Slepian was shot with a rifle.

Kopp also had been linked, through DNA testing, to a strand of hair found near where the sniper fired, law enforcement sources have said.

Marilyn Buckham, director of Buffalo GYN Womenservices, told WIVB-TV that the arrest will give some closure for the staff and Slepian's family, calling him "our doctor and our friend and our colleague."

In January 2000, Canadian officials issued an arrest warrant for Kopp in the attempted murder of Dr. Hugh Short, an abortion doctor shot at his home in Ancaster, Ontario, near Hamilton, in 1995.

Police also want to talk to Kopp in the shootings of Dr. Garson Romalis of Vancouver in 1994 and Dr. Jack Fainman of Winnipeg in 1997.