Clashes between Peruvian police and protesters opposed to the expansion of a prison south of this capital left one dead and 20 injured, local media reported.

Pierre Eduardo Gonzales Arias, 24, died of an apparent gunshot wound during Friday’s disturbances in the coastal province of Cañete, Raul Castañeda Marin, the director of an area hospital, told the Radio Programas station.

Both civilians and law-enforcement personnel were injured in the melee, which pitted police against hundreds of people opposed to the expansion of the La Cantera prison, located about 150 kilometers (93 miles) south of Lima.

Police quickly brought a halt to the unrest, clearing the Panamericana Sur highway with the help of a helicopter that fired tear gas to disperse the demonstrators.