Hundreds of demonstrators marched through San Antonio's East Side on Saturday morning to protest against White House plans to open a massive Immigration and Customs Enforcement detention center there.

ICE bought the warehouse at 542 SE Loop 410 earlier this year and plans to use it as a holding site for up to 1,500 detainees at a time.

The plan has met with opposition from local officials, and Mayor Gina Ortiz Jones announced Friday that she would back legal action by the city to prevent it from opening.