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HOUSTON (AP) — Harris County authorities found more than bingo cards when they raided a Houston-area bingo hall.

Police and deputies say they made a dozen arrests and seized 100 guns, ammunition, body armor and about $87,000 in an underground bunker at the Paradise Day and Night Bingo Hall. Those arrested are charged with engaging in an organized criminal activity.

Authorities say back rooms at the bingo hall contained machines similar to slot machines that customers illegally could play to collect cash prizes. Prosecutors also say the hall’s owners had their own ATM machines to launder an estimated $15 million in illegal earnings over the last four years.

An attorney for the owners, Stephen St. Mark, says the hall is a legitimate state-licensed bingo operation. He calls the raid ridiculous.

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