Police described a suspect in the shooting death of a Seattle policeman as a "lone domestic terrorist" and said he was also suspected of firebombing four police vehicles.

At a news conference, Seattle Assistant Police Chief Jim Pugel identified 41-year-old Christopher Monfort as the man shot by police on Friday as he was sought in connection with the Halloween killing of officer Timothy Brenton. Pugel also said investigators found improvised explosive devices at Monfort's apartment.

"This man, from everything we can tell, is a lone domestic terrorist," Pugel said. "At this moment, we cannot find any ties to anyone else."

Police evacuated part of Monfort's apartment complex Saturday evening after finding what was described as a "potential hazard," Seattle's KING 5 News reported. Police didn't elaborate on the evacuation but allowed residents to return to their homes after about an hour.

In serious condition

Brenton was sitting in a car October 31 with rookie officer Britt Sweeney following a traffic stop when shots were fired. Sweeney was grazed in the neck.

Detectives have asked the King County prosecutor's office for formal charges in the case.

Yesterday morning, Monfort was still in serious condition in the intensive care unit at Harborview Medical Center, said hospital spokeswoman Susan Gregg-Hanson. He underwent hours of surgery Friday night and arrived at the hospital in critical condition with "multiple injuries".