Signal Staff Writers Firefighters battled a brush fire in Castaic Wednesday afternoon that prompted evacuation warnings for nearby homes and businesses, but had to restrict their ground attack due to the fire’s proximity to a Los Angeles County Sheriff’s Department bomb squad training facility. Mandatory evacuations were ordered for north and west of West Hills Drive, north of Iron Village Drive, north and west of Tesoro Del Valle and north of Copper Hill Drive. Rye Canyon Loop remained under voluntary evacuation status as of 6:45 p.m. Additional evacuation warnings were issued for Bellows Court, Via Patina and Platinum Court areas, as the fire was reportedly moving to the east. Residents in the area should anticipate the possibility of evacuation, Los Angeles County Fire Department officials announced late Wednesday afternoon.