Gunmen burst into a bar in the Mexican city of Monterrey and shot dead at least 20 people yesterday, the latest massacre in the city battered by drug-gang violence, El Universal newspaper reported.
At least five people were injured, the paper reported, citing local police.
The gunmen fired AK-47 assault rifles throughout the bar in downtown Monterrey.
Over the last four years, industrial and relatively prosperous Monterrey has gone from being a model for developing economies to a symbol of Mexico's drug war chaos as rival gangs fight one another in the city's streets.