A dozen construction workers were sent to the hospital with carbon monoxide poisoning while they were working on a bank in Odenton on Tuesday morning.
Anne Arundel County Fire officials say the constructions workers had been at the Navy Federal Credit Union since around 5 a.m., but around 8 a.m. they started complaining about symptoms consistent with carbon monoxide poisoning.
After fire crews got to the scene, they discovered the workers had been using a propane-powered saw, which they believed caused the symptoms of the poisoning.
Three workers went to the Hyperbaric Medicine Facilities at Shock Trauma with serious, but non-life threatening symptoms, and the other nine were sent to the University of Maryland hospital in Baltimore with possibly serious, but non-life threatening injuries.
Officials say 11 of the workers injured were men and one was a woman. The workers range from ages 11 to 55.
Around 9:45 a.m. crews were able to confirm there was no longer any carbon monoxide inside of the building, and they let the bankers and customers go back inside.