HOUSTON -- A man was killed by federal agents on Monday after he opened fire at a US Border Patrol facility in McAllen, a southern Texas city near the border with Mexico, authorities said.

The man was identified as 27-year-old Ryan Louis Mosqueda, McAllen Police Chief Victor Rodriguez told local reporters.

Mosqueda, using an assault rifle, fired dozens of rounds before he was killed by federal agents who returned fire, said Rodriguez.

The shooter was later found carrying a second rifle, more ammunition and backpacks, Rodriguez said, adding that an officer was injured during the crossfire.

The border patrol facility is located just across a street from the McAllen International Airport, which was shut down temperately as a precaution.

Mosqueda's motive is currently unknown, said the police chief, adding that the Federal Bureau of Investigation is investigating.