Arizona ? Gunmen apparently trying to seize a smugglers’ truckload of drugs attacked a pickup hauling 23 suspected illegal immigrants early Friday, killing two people and wounding another, authorities said.

Within hours, Border Patrol agents tracking footprints found two men along with three high-powered weapons near a campsite south of where the shooting occurred, a Border Patrol deputy chief and Pima County Sheriff Clarence Dupnik said.

The men were questioned Friday afternoon. They admitted to firing high-powered weapons into the truck and were charged with two counts each of homicide and 21 counts each of attempted homicide.

In custody were Rosario Humberto Araujo-Monarrez, 21, and Martin Esrain Flores-Gaxiola, 18, from the Mexican state of Sinaloa.