Falls Church, VA – Nineteen people were hospitalized after a carbon monoxide leak in Fairfax County, Va.

Officials say Fairfax County Fire and Rescue Services was called to the 6200 block of Leesburg Pike around 4:30 p.m. When they arrived, they found high carbon monoxide in the building.

A number of people were complaining of nausea and sickness, which is common with carbon monoxide poisoning.

Officials say the cause of the leak was a faulty furnace.