Gunfight against kidnappers with sniper rifle and grenades injures four officers

Police drive away after confrontations with what they claim were groups of criminals that left several in their ranks wounded, and more than a dozen persons detained, in Tupilejo, on the outskirts of Mexico City (Marco Ugarte/AP)

Mexico City police engaged in a shootout with more than a dozen gunmen armed with a .50 caliber sniper rifle, grenades and a machine gun, authorities said.

City police chief Omar Garcia Harfuch said four officers were hurt, one seriously, on Tuesday.