SAN FRANCISCO (CBS SF/AP/BCN) — A hours-long police standoff with a suicidal armed man ended peacefully Saturday.

The incident prompted the evacuation of San Francisco’s Civic Center and nearby United Nations Plaza.

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At about 6 p.m. police spokesman Carlos Manfredi tweeted, “Suspect surrendered peacefully without further incident.”

Manfredi commended the crisis workers and negotiators at the scene.

Fire officials first reported the incident around 12:25 p.m. on Twitter.

Police cleared City Hall Plaza between City Hall and United Nations Plaza after an officer spotted the suspect with a weapon.

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People in nearby buildings were told to leave and traffic into the area was blocked off as negotiators talked to the man.

Manfredi said the man called police around noon saying he was thinking of hurting himself and possibly other people. Apparently he has threatened suicide in the past.

The standoff caused traffic to back up in the area around City Hall.

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