NORWICH – Emergency crews from the Norwich Fire Department responded to an incident Saturday that resulted in five people being hospitalized due to carbon monoxide poisoning.

A seven-unit apartment house at 5617 Rt. 12 in the Town of Norwich, was evacuated early Saturday morning and its tenants, one of them a pregnant woman, were taken to Chenango Memorial Hospital, said Deputy Fire Coordinator Michael K. Beckwith. Five of out of the “10 to 12” residents were taken for treatment by emergency crews.

Firefighters said no carbon monoxide detectors were in the home and that the cause of the poisoning was a faulty heating unit that was improperly maintained.

Norwich FD Captain Michael Ford said crews detected the highest level of carbon monoxide at 600 parts per million.