U.S. Army Stryker armored vehicles began rolling to locations along the Mexican border in El Paso and the Big Bend regions of West Texas, the military's Joint Task Force Southern Border said.

U.S. troops will not conduct law enforcement activities and Customs and Border Protection agents will be “on-hand or nearby” during patrols.

Soldiers from Fort Carson have been cleared to transport Customs and Border Patrol agents while they assist with illegal-immigration enforcement.