We are riding shotgun with border patrol agents as they drive us along the state line, where Texas turns into New Mexico and both states border Chihuahua, Mexico. This is the first embed given to any world news outlet by the U.

According to reports, there were no injuries in the incident near Fronton Island, an uninhabited island in Starr County, Texas.

A gunshot was fired from the southern side of the U.S.-Mexico border toward U.S. Border Patrol agents, and multiple shots were returned by U.S. authorities into Mexico, according to federal and state law enforcement officials sources with firsthand knowledge of the situation.