Law enforcement from the border region are responding to an active shooter call at a Uvalde, Texas, elementary school. At least one 911 call was placed from within Robb Elementary School. Border Patrol agents, BORTAC special response team, and Texas Highway Patrol troopers are on the scene to assist local first responders. The situation unfolded at approximately 11:50 local time when shots were initially heard in the vicinity of the elementary campus.