PORTLAND, Ore. (KOIN) – One person suffered burn injuries as a result of an apartment fire in Happy Valley early Sunday morning, Clackamas Fire District said. 

Crews responded to the fire on Southeast 104th Court, near Southeast Sunnyside Road, at around 3 a.m.

Izak Hamilton, public information officer with Clackamas Fire District, said one person was transported to a burn center for treatment of their injuries. 

Two apartment units were badly damaged by the fire and a total of four units had smoke damage, Hamilton said. 

Firefighters knocked down the flames within 18 minutes of arriving. 

Hamilton said the cause of the fire is under investigation.