It was not immediately clear what caused the blast at the Los Angeles County Sheriff’s Department’s Biscailuz Training Academy center. No one else was injured, officials said.
Gregory Bovino, center, the head of Border Patrol’s El Centro region, at MacArthur Park in Los Angeles last week. Mr. Bovino said that federal agents had begun operations in the Sacramento area.
An A.C.L.U. lawyer said it was possible that any sheriff who complied with the request could be in violation of California’s so-called sanctuary state law.
Sheriff Robert Luna of Los Angeles County, third from right, with deputies in Altadena, Calif., in January. His agency signaled it would not honor a request the Justice Department’s request for the names of noncitizen inmates.