Mexican officials stated Statement that 49 people were decapitated Killing and mutilated Bodily_harm by members of Los Zetas drug Committing_crime cartel and dumped by a roadside near the city of Monterrey in northern Mexico .

The metropolitan area of Monterrey is an important warehousing center for cocaine , marijuana and other illegal Legality drugs Bodily_harm bound for U.S. consumers .

On August 25 , 2011 , members of Los Zetas set Destroying a casino on fire in Monterrey , Nuevo León , Mexico , killing Killing 52 people .

This attack Attack was classified Check as the most violent and bloodiest in the history of Monterrey and one of the worst in the whole state of Nuevo León .

One of the fugitives , Óscar Manuel Bernal alias `` La Araña '' ( The Spider ) , is considered by the Mexican authorities to be `` extremely dangerous , '' and is believed Know to be the leader of Los Zetas in the municipality of Monterrey .

After the split of the Gulf Cartel and Los Zetas in early 2010 , both groups have been battling Hostile_encounter for Monterrey and other areas in northeastern Mexico .

Damage was most evident in the Monterrey metropolitan area , which faced Confronting_problem what Nuevo León governor Rodrigo Medina de la Cruz described Statement as , `` the worst weather phenomenon in its history . ''