Oakland Mayor Libby Schaaf recently alerted the city that Immigration and Customs Enforcement (ICE) agents soon would be conducting workplace raids and now she is being investigated to see she broke any laws by issuing the warning. It is Oaklands legal right to be a sanctuary city and we have not broken any laws, she said. San Francisco Mayor Mark Farrell also defended his citys right to stand by hardworking, law-abiding immigrant neighbors. The sweep was the second to target California since a statewide sanctuary law signed by Gov. Jerry Brown went into effect in January. The legislation limits the circumstances in which jails across the state can turn over undocumented inmates to ICE and forbids police from arresting people on immigration warrants.