Courtesy Tucson Police Department

A Tucson Border Patrol agent was assaulted on the Tohono O'odham Indian Reservation Saturday, after he encountered two suspects believed to have entered the country illegally, officials said.

Agents assigned to the Three Points station tracked the two Mexican nationals to the Reservation, near the village of Vamori, according to a news release from U.S. Customs and Border Protection.

One of the suspects ran and when the agent caught up to him and tried to put him in handcuffs, the man became combative, the release said.

The 43-year-old suspect was taken into custody, and the agent was treated for his injuries at a local hospital and released. The suspect is facing charges for assault on a federal officer, as well as immigration violation, the release said.

The other suspect was arrested without incident.

Contact reporter Caitlin Schmidt at cschmidt@tucson.com or 573-4191