Former DEA agent Derek Maltz issues a dire warning against the Mexican cartels on 'America's Newrsoom.' U.S. Border Patrol agents in Arizona apprehended nearly 200 illegal immigrants near the Mexican border on Wednesday, finding that well over half were unaccompanied children. Agents with the Tucson border sector encountered a group of 197 illegal immigrants shortly after 7 a.m. near San Miguel, just a few miles north of the U.S.-Mexican border. Three-fourths of the migrants were unaccompanied children. (CBP) The agents determined that 147 were unaccompanied children and that most of them had come from Guatemala. A spokesperson for the U.S. Customs and Border Protection told Fox News that members of the group were transported to CBP’s processing facility where they were fed, medically screened, and processed for turnover of custody to the Department of Homeland Security’s Health and Human Services.