Federal investigators are now in Cincinnati where about a dozen construction workers have been injured in a collapse at a casino.

Cincinnati's fire chief says a crew was pouring concrete Friday when a support bean gave way, sending the workers tumbling 30 feet to the ground

The fire chief says the injuries are mainly bruises and bumps, and possibly some broken bones

The Occupational Safety and Health Administration says its inspectors are on the scene.

A check of federal records shows the general contractor overseeing the casino project has a clean safety record with OSHA since 2006 when it was penalized for four violations and paid a $3,100 fine.

Developers of the Cincinnati casino say work won't resume until the construction team and authorities say the site is safe.

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