The U.S. Border Patrol says it is asking for the public’s assistance with information anyone may have about who shot an agent early Tuesday morning. 

The agent shot is a veteran agent who has worked 21 years for the Border Patrol. The agent is in good condition and he was able to perform first aid on himself as he called for help.

He was attacked in the pre-dawn hours south of Arivaca, Arizona, while out checking ground sensors, said Tucson Sector Chief Rodolfo Karisch, who visited the wounded agent in the hospital and says he’s in good spirits.

"I want to ask if anyone has information believed to be relevant to this incident, please call your local FBI office or report it to [email protected]," he said.

A special response team deployed to the area after the agent was medevaced out found a group of people and apprehended them. But Karisch said they are only being held on immigration violations and have not been charged in connection with the attack.

The FBI and two other agencies that look into Border Patrol internal issues, the Office of Professional Responsibility and the Office of Inspector General are investigating the shooting.