A spokeswoman for the FBI tells The Associated Press that Mexican soldiers pointed their rifles and chased away U.S. Border Patrol agents investigating the shooting of a 15-year-old Mexican.

The boy was shot by a Border Patrol agent who says he was defending himself from rock throwers along the nearly dry Rio Grande that divides Ciudad Juarez, Mexico, from El Paso, Texas.

FBI spokeswoman Andrea Simmons said Wednesday that Border Patrol investigators were forced to leave the scene Monday night after soldiers aimed guns at them from across the river.