A violent sexual predator considered armed and dangerous who was seen in Berkeley and Oakland last week was captured without incident in Portland, Ore. Friday night, according to the FBI.

The U.S. Marshals Service Fugitive Task Force arrested 28-year-old Kevin Anthony Briggs without incident, according to the FBI office in San Francisco.

Briggs, a convicted felon and registered sex offender, was wanted for his alleged involvement in assaults on a woman and on a police officer in Bozeman, Mont., where he escaped from custody three weeks ago.

On the morning of Feb. 1, a woman called the Bozeman Police Department to report an assault, and said her attacker had tried strangle her before he left. When police located Briggs, he allegedly resisted arrest and hit an officer in the face, authorities said. He was arrested but escaped custody.

That night, he bought a one-way bus ticket to Spokane, Wash. He had a warrant for his arrest for aggravated assault, attempted sexual intercourse without consent, assault on a peace officer and escape, authorities said. Briggs is on probation for 2004 convictions for sexual intercourse without consent, aggravated kidnapping, escape and burglary in Montana.

Contact Doug Oakley at 925-234-1699. Follow him on Twitter at www.twitter.com/douglasoakley