Residents were evacuated from an apartment building in Dartmouth, N.S., early Sunday morning due to high levels of carbon monoxide, with a total of five people treated at hospital.

Halifax Regional Fire and Emergency district Chief Stephen Turner said fire crews received a call at 1:08 a.m. AT from medical personnel at the Dartmouth General Hospital.

He said there was a patient there with high levels of carbon monoxide, which prompted the staff to notify the fire department about potential carbon…