The Texas Military Department, which oversees the National Guard, said Monday the shooting is under investigation. “More information will be made available as the investigation progresses,” the department said in a statement.

Shooting incidents in which U.S. forces fire into Mexican territory are generally rare, although prominent Republicans, including several 2024 presidential candidates, have called for escalating U.S. military force against criminal organizations on the Mexican side of the border.

News accounts in Mexico identified the wounded man as a 22-year-old Mexican migrant who was attempting to reach the United States from Ciudad Juarez when he was struck by gunfire from U.S. authorities.

Mexico’s Foreign Ministry has not addressed the incident, and officials there and at the Texas Department of Public Safety did not immediately respond to a request for comment.

This is a developing story. It will be updated. Arelis R. Hernández contributed to this report.