Updated

A series of recent immigration raids in the Bay Area is prompting Mayor Gavin Newsom to pledge that San Francisco will remain a so-called "sanctuary city."

Newsom promised that San Francisco officials won't help federal authorities in conducting raids in a speech on Sunday to about 300 mostly Latino members of St. Peter's Church.

The Board of Supervisors first declared San Francisco a sanctuary city in 1989.

The designation has no legal meaning, but Newsom promised that no city employee would assist in the raids.

Newsom's comments come after a series of recent raids by U.S. Immigration and Customs Enforcement officials throughout the Bay Area.

On Friday, immigration agents arrested 13 foreign nationals who were working illegally at an Oakland manufacturing company.