Gunmen open fire at bar in northern Mexico killing 8, wounding 20

Gunmen kill 8 at bar in northern Mexico

PIEDRAS NEGRAS, Mexico — Authorities in northern Mexico say gunmen opened fire on a bar in the city of Torreon. Eight people are dead and 20 wounded.

Coahuila state prosecutors say at least six gunmen arrived before dawn Saturday at a bar that was being inaugurated in the city of Torreon and started shooting.

Prosecutors say no arrests have been made and that a motive for the attack has not been determined.

Coahuila state in northeast Mexico has seen a spike in drug-related violence that authorities attribute to a fight between the Gulf cartel and former enforcers known as the Zetas.

Drug-related violence in Mexico has claimed more than 22,700 lives President Felipe Calderon launched a crackdown against drug traffickers in December 2006.