MONTERREY - Armed men killed atleast 51 people in an attack on a casino in northern Mexicothat left the building ablaze with gamblers trapped inside,officials said on Thursday.People remained stuck inside the Casino Royale building inMonterrey, a prosperous city 140 miles from the Texasborder that has suffered from increasing criminal violence inrecent months.
"There are more than 20 people dead but rescue efforts arestill ongoing," Monterrey Mayor Fernando Larrazabal told a newsconference.A survivor told Milenio TV that a group of masked armed mendriving four trucks arrived to the casino, burst into it andthreatened gamblers. They then started spraying gasoline andset fire to the building.