(Portland, OR) -- Four people are reported to be injured, after a fire damaged five units in an apartment building in Southeast Portland. Officials say the blaze started around four o'clock yesterday afternoon at the Hidden Court complex on Southeast 121st Avenue. Authorities say one man jumped out a window of an upstairs unit to escape the flames. Another man was taken to a hospital, and two people were treated at the scene. Investigators are trying to determine what caused the fire.