Gunmen with assault rifles burst into event in western state of Michoacán long plagued by violence between drug cartels
Mexican authorities have confirmed that 20 people were killed when a group of gunmen stormed an illegal cockfight, in a small town in the western state of Michoacán.
Officials and witnesses described a choreographed massacre in which assailants in military uniforms arrived just after 10.30pm on Sunday night and opened fire with assault rifles at the crowds of primarily middle-aged men.
