A 27-year-old individual was fatally shot on Monday after engaging in gunfire at a U.S. Border Patrol facility in McAllen, Texas, according to law enforcement officials.

Ryan Louis Mosqueda was armed with an assault rifle and equipped with a utility vest when federal agents fired back on Monday morning, McAllen Police Chief Victor Rodriguez informed the press. Rodriguez mentioned that authorities were alerted to the incident at about 5:50 a.m., as Mosqueda discharged numerous rounds.

The shooting took place at a facility across the street from McAllen International Airport, which was shut down as a precaution.

Following the event, law enforcement officials discovered another rifle, additional ammunition, and backpacks which the suspect had with him. Rodriguez stated that the motive behind Mosqueda’s actions remains unclear.

One officer was injured in the shooting, but Rodriguez said it was unclear if the injury was from shrapnel or a bullet.

Mosqueda allegedly pulled up to the facility in a white two-door sedan. Rodriguez said something was written on the car, possibly in Latin, but “what it means, or whether or not it is an underlying reason for him being here, I do not know.”

Mosqueda was linked to an address in Michigan, but was reported missing from a Weslaco, Texas, address around 4 a.m. Monday. Weslaco is about 20 miles (32 kilometers) from the Border Patrol facility.

“An hour and a few minutes later, he was at this particular location opening fire on the federal building and our federal agents,” Rodriguez said.

Additional information about the missing person report, including who reported it and the circumstances, was not immediately made available.

Going forward, the FBI will be handling the investigation, Rodriguez said.