Police at the University of Arizona have begun carrying stun guns on the Tucson campus.

The police department purchased 10 Tasers, which administer a non-lethal shock that normally incapacitates a suspect without causing permanent damage. The stun guns are one of several so-called less-lethal weapons at the disposal of university officers, who also carry pepper spray and batons, and are trained in hand-control tactics.

Officers must undergo four hours of training before the department will authorize them to carry the Tasers.