NEW : Officials say the death toll in grenade attack is up to 30 . President Nuevo Leon responds to attack via his Twitter account . Grenade attack reported at a casino in Mexico , in northeastern Monterrey . The commission again makes clear that the insecurity in the country requires public officials responsible for implementing and enforcing the law , carry out preventive actions to protect society and away from any violence . '' Up to 53 people thought trapped in the casino because of debris .
NEW : Officials say the death toll in grenade attack is up to 30 . President Nuevo Leon responds to attack via his Twitter account . Grenade attack reported at a casino in Mexico , in northeastern Monterrey . Up to 53 people thought trapped in the casino because of debris .