The 27-year-old shooter is dead and three officers are injured following an early morning shooting at a CBP station in McAllen, Texas

Border Patrol and local police say the alleged shooter was killed when officers returned fire. An investigation is ongoing.

The incident took place at the entrance of the U.S. Border Patrol sector annex in McAllen, a city in southern Texas that borders Mexico, according to the DHS spokesperson. Mosqueda fired dozens of rounds toward the building and agents inside, Rodriguez said.