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Authorities have released security camera footage taken outside a Monterrey casino where 52 died in what officials are calling an 'act of terror.'

The deadly attack happened near downtown Monterrey late Thursday afternoon.

Gunmen stormed the building and doused the casino with a flammable liquid and then ignited it.

People hiding from the gunmen in restrooms and other places died after becoming trapped by the flames or succumbing to smoke.

Mexican officials released security camera footage taken from the outside of the casino.

The suspects are seen arriving at the casino and people are recorded on tape fleeing for their lives.

The final frames of the surveillance video show flames and black smoke.

Mexican President Felipe Calderon is blaming drug traffickers and vowed to bring those responsible to justice.

Mexico's Security Secretary Alejandro Poire denounced the narco-attack as an 'act of terror.'

Officials are offering a $30 million peso reward for information leading to the arrests of those responsible.