( CNN ) -- One person was killed in a shooting involving Border Patrol agents at the U.S.-Mexico border , Mexican state media reported Thursday . A U.S. Border Patrol agent shot and killed an adolescent who had been throwing rocks alongside several others at the border , the state-run Notimex news agency said , citing anonymous sources . In a statement released earlier Thursday , the U.S. Border Patrol confirmed the Wednesday night shooting , but did not say whether anyone had been killed . Citing preliminary reports , the Border Patrol said agents saw smugglers drop drugs on the U.S. side of the border in Nogales , Arizona , then return to Mexico . `` Subjects at the scene then began assaulting the agents with rocks , '' the Border Patrol said in a written statement . `` After verbal commands from agents to cease were ignored , one agent then discharged his service firearm , '' the Border Patrol said . `` One of the subjects appeared to have been hit . '' The FBI is investigating the shooting , the Border Patrol said . Mexico 's government condemned the violence and called for a swift investigation , Notimex said . `` Preliminary information available at this moment once again generates serious doubts about the use of lethal force by Border Patrol agents , which the Mexican government and Mexican society strongly condemn and deplore , '' Mexico 's foreign ministry said in a statement Thursday night , according to Notimex . In response to similar shootings in September and July , Mexico 's foreign ministry has criticized what it said was `` disproportionate use of lethal force '' at the border . In 2010 , the FBI investigated after a Border Patrol agent shot and killed a Mexican teen along the border between El Paso , Texas , and Ciudad Juarez , Mexico . Federal officials closed the case in April , saying there was not enough evidence to pursue charges against the officer and that he acted within the agency 's policies for use of force . The officer received widespread condemnation from critics who questioned his use of deadly force against 15-year-old Sergio Adrian Hernandez Guereca , who authorities said had been throwing rocks at the agent when he was shot and killed . Hernandez had a history of involvement with human smuggling and was on a list of repeat juvenile offenders , U.S. Customs and Border Protection spokesman Mark Qualia said after the shooting . An appeal is pending in a lawsuit filed by the teen 's parents in U.S. federal court , accusing the officer of using excessive force . The Mexican government filed a friend of the court brief in the case , noting that its request to extradite the Border Patrol agent for prosecution had been denied . `` As a matter of international responsibility , the fact that the victim was on Mexican soil when he was killed does not absolve the United States of responsibility for the acts of its agent , '' the brief said . Alleged senior member of Tijuana drug cartel extradited to U.S. Mexico confirms death of feared Zetas cartel leader . Suspect arrested in Falcon Lake killing , Mexican authorities say . CNN 's Eduardo Aragon , Elwyn Lopez and Catherine E. Shoichet contributed to this report .
Sources : FBI : The violence sparks ` ` serious doubts about the use of lethal force '' Notimex : A U.S. Border Patrol agent shoots and kills an adolescent . Border patrol : An agent opens fire in response to rock - throwing . The FBI is investigating .