The Portland Fire Department responded to an apartment building at 100 State Street at 2:39 Saturday afternoon.
A dryer fire in a second-floor laundry room activated the sprinkler system, according to chief Dale Dyer. The sprinklers contained the fire and allowed crews to extinguish what was left with a water can, the department said in a social media post.
Several tenants were moved to different apartments in the building due to water damage, Dyer said.
There were no reported injuries, according to Dyer. The cause of the fire is under investigation.
The department had advised people to be cautious in the area as crews worked at the scene. Police were diverting traffic at the intersection of State and Spring streets.