Hamden police and fire officials are investigating a suspicious fire at an apartment complex.
Police and firefighters responded to Hamden Village at 188 Treadwell Street around midnight on Thursday morning for a reported structure fire.
Officers determined the fire was burning on the exterior wall of one apartment, according to police.
A good Samaritan used a fire extinguisher and a bucket of water to douse the flames, police said.
One person was treated for possible smoke inhalation.
