PHOENIX - A mayor in Mexico says a boy killed by a U.S. federal agent was shot seven times.

Nogales Mayor Ramon Guzman Munoz tells The Associated Press there was a "burst of gunfire," and that authorities found 10 bullet markings in a nearby building. The mayor called the shooting "deplorable."

The U.S. Border Patrol says several agents responded Wednesday night to reports of suspected drug smugglers in Nogales, Arizona, then were pelted by rocks thrown at them from across the border. The agency says the people ignored orders to stop, and an agent opened fired.

Border Patrol officials have only said it appeared someone was shot. An investigation was ongoing.

Mexican authorities said 16-year-old Jose Antonio Elena Rodriguez was found dead at the border about midnight Wednesday.