ALAMEDA, Calif. (AP) — Protesters gathered Thursday outside a U.S. Coast Guard base in the San Francisco Bay Area, where U.S. Customs and Border Protection agents began arriving to support federal efforts to track down immigrants in the country illegally.

About 150 people, many carrying signs saying “No ICE or troops in the Bay,” referring to U.S. Customs and Immigration Enforcement, gathered shortly after dawn outside the base in Alameda. Police used at least one flash-bang grenade to clear a handful of demonstrators from the entrance as CBP vehicles drove through.

The San Francisco Chronicle , citing an anonymous source with knowledge of the operation, reported Wednesday that more than 100 CBP and other federal agents would arrive this week. San Francisco Mayor Daniel Lurie and Califo

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