People living in four apartments on South Alpha Avenue in Sahuarita were evacuated early Friday after a smoke detector went off.
Sahuarita Police Sgt. Michael Falquez said Green Valley Fire District firefighters and Sahuarita Police helped everyone evacuate around 1:30 a.m. and an investigation revealed a faulty rooftop HVAC unit was emitting smoke.
Everyone was allowed back into their homes around 2:20 a.m.
