Crews responded to a fire at Southern Connecticut State University on Tuesday morning. The fire was contained to one dorm room at the West Campus residence complex, according to a fire official. The complex was evacuated by police, who said they found heavy smoke billowing from a second floor suite around 2 a.m. "New Haven firefighters found that the suite’s sprinkler system had doused the flames when they arrived soon after," a school spokesperson said. "The preliminary cause of the fire appears to be a discarded cigarette." Three people were treated for smoke inhalation, but were not transported to the hospital. Residents were allowed back into the building around 5 a.m.