California Chief Justice Tani Cantil-Sakauye on Friday repeated her two-year-old plea to immigration enforcement officers to stay out of state courthouses, as federal authorities announced plans to round up undocumented immigrants starting Sunday.

President Donald Trump tweeted Monday that the U.S. Immigration and Customs Enforcement office would begin removing “millions of illegal aliens who have illicitly found their way into the United States” next week. National media outlets, citing unnamed sources, said ICE plans to target up to 2,000 immigrants that have received deportation orders.