An agent opened fire on a group of people throwing rocks across the fence with Mexico in Nogales, Ariz., killing one of them, El Imparcial newspaper reported.
Agents had reports of two suspected narcotics smugglers near the border at about 11:30 p.m. Wednesday, the Border Patrol said in a news release. The agents watched the two abandon a load of narcotics and run back to Mexico.
People on the south side of the border fence then began throwing rocks at the agents and ignored orders to stop, the release said. One agent opened fire and it appeared he struck one of the people, news release said.
Bullets struck five spots on the outside of an office where medical exams are performed, El Imparcial reported.
The Border Patrol has not confirmed the victim was fatally shot, but it has been reported by news outlets in Sonora.