Mexico : There were conflicting unconfirmed reports from local media that the assailants poured gasoline on the building before setting it on fire . Officials say the death toll in grenade attack is up to 50 . President Felipe Calderon denies to attack via his Twitter account . The attack occurred at a casino in Monterrey , in northeastern Mexico . Up to 50 people thought trapped in the casino because of security .
Mexico : Officials say the death toll in grenade attack is up to 50 . President Felipe Calderon denies to attack via his Twitter account . The attack occurred at a casino in Monterrey , in northeastern Mexico . Up to 50 people thought trapped in the casino because of security .