Conflicting versions of the incident Monday have emerged, but what is clear is that Border Patrol agents riding in a boat in the shores off Laredo, Texas, fired, fatally wounding the man in the chest and leg, the Laredo Morning Times reported.
The U.S. Border Patrol released a statement, saying the agents were "subjected to rocks being thrown at them from the Mexican side of the Rio Grande" in Nuevo Laredo, Mexico.
"All appropriate authorities were notified and the shooting is under investigation by the FBI," the statement said.
Family members of the victim, Guillermo Arevalo Pedroza, 36, told Mexican authorities he was grilling food for his wife and two children. The group could hear agents pursuing someone in the water but were unable to tell what was going on until they heard gunshots and Pedroza dropped dead, the family said. His wife took him to a nearby hospital where he was declared dead on arrival.
The man's wife told Mexican authorities her husband was not throwing rocks.