Nearly a dozen people were injured Monday when the roof of Larry Flynt’s Lucky Lady Casino in Gardena, California, reportedly caved in on them.

The collapse occurred around 10:15 a.m. and affected a small portion of the roof — in an area where two large commercial air conditioners are located, CBS2 reports.

“Currently we don’t have the exact cause of why this happened,” said LA County Fire captain Tony Imbrenda after the incident. “But clearly, as evidenced by the photographs that we’re seeing right now live on television, the area of this collapse was primarily around the area where a couple of large commercial air conditioners are situated on top of that roof.”

A spokesperson for the Flynt Management Group told CBS that they had brought in “architects” to figure out what caused the collapse. Eleven people wound up being treated for injuries, all minor.

Photos posted on social media showed the extent of the damage, with blackjack tables and other board games covered in debris. The collapse was said to have occurred in the lobby area of the 100-foot-by-100-foot building.

“Lady luck ran out I guess,” joked one Twitter user.

“All bets are off,” another said.