We will do absolutely everything ... to restore tranquility . '' NEW : Officials say the death toll in grenade attack is 30 . President Javier Estrada responds to attack via his Twitter account . Grenade attack reported at a casino in Mexico , in northeastern Monterrey . Up to up to 40 people thought trapped in the casino because of debris .
NEW : Officials say the death toll in grenade attack is 30 . President Javier Estrada responds to attack via his Twitter account . Grenade attack reported at a casino in Mexico , in northeastern Monterrey . Up to up to 40 people thought trapped in the casino because of debris .