“This morning, an individual opened fire at the entrance of the United States Border Patrol sector annex in McAllen, Texas,” a statement from Homeland Security officials provided to Fox reads. “Both Border Patrol agents and local police helped neutralize the shooter. This is an ongoing investigation led by the FBI.”

An armed man wearing tactical gear launched an apparent ambush early in the morning on Monday, July 7, at a U.S. Border Patrol annex building in McAllen, Texas, near the city's international airport.

A gunman who ambushed Border Patrol agents in McAllen, Texas, was shot and killed when agents returned fire, according to Fox News correspondent Bill Melugin.