Several Border Patrol agents were fired upon Wednesday evening in Nogales while responding to a call about a vehicle that was entering the country without going through a port of entry, an official said Thursday.

Around 7 p.m. Border Patrol agents responded to a report of a silver Mercedes sport utility vehicle driving through the desert in Nogales, said Jesus Rodriguez, a spokesman for the agency's Tucson Sector.

As the agents neared the SUV, they were fired upon, he said. One patrol vehicle took rounds to the windshield and the body.

The agent in that vehicle fired back as did another agent in a separate vehicle, he said.

No agents were injured and it was unclear if any of the suspects were hit, Rodriguez said.

The SUV was abandoned and three people were seen running from that general area, he said. Inside the SUV, agents discovered 700 pounds of what appears to be marijuana.

The Nogales Police Department apprehended one person who may be involved with the incident, Rodriguez said.

The names of the agents involved in the shooting were not released Thursday morning.