Gunmen killed a policeman and a 15-year-old boy when they opened fire and hurled a grenade at a crowded taco stall in a Mexican city.

FEDERAL forces have detained 10 mayors and 18 other officials for allegedly protecting one of Mexico’s most violent drug cartels in an unprecedented anti-corruption sweep in the Pacific coast state of Michoacan.

Gunmen barged into a bar in central Mexico early today and tossed five human heads on the dance floor, Mexican media reported.