The FBI has launched an investigation into a shooting between agents and people standing across the Rio Grande. According to officials, agents fired their weapons across the border after the suspects allegedly threw rocks at them. Meanwhile, in Nuevo Laredo a woman has come forward, claiming her husband was killed by border patrol gunfire. Nora Isabel Lam Gallegos said she and her husband were out by the riverbanks at a popular spot frequented by locals. It was there that she said her husband Guillermo Arevalo Pedroza, 36, was allegedly shot by gunfire. According to reports, Gallegos and five other witnesses claim agents in a border patrol boat were trying to apprehend a man in the river trying to cross illegally. She said this happened near a park by the river, where there were about fifty people present. Gallegos recounted her experience, describing what she said happened moments after her husband was shot. The U.S. border patrol released a statement Tuesday afternoon. They acknowledge an incident happened on Monday saying agents were under attack and people from the Mexican side were throwing rocks at them. At this time, border patrol officials will not confirm if any of the Mexican nationals were hit by gunfire, but we do know that no border patrol agents were hurt. FBI is now investigating this case as an assault upon a federal officer.