Hundreds of migrant families seeking asylum in the U.S. were released from detention in Arizona this week without warning and without instructions on where to go, how to find relatives or travel to their court hearings. A senior Department of Homeland Security official told NBC News the release is "the start of a dam breaking" as family detention facilities, which now hold thousands of migrants, reach capacity.U.S. Immigration and Customs Enforcement officers are releasing the families from detention en masse without following their usual protocol that ensures immigrants have a means to travel to their court hearing and reunite with potential relatives in the U.S.The adults have ankle monitors to track their whereabouts until their scheduled court date to make their case before a judge for asylum.