By Al Novack

PHILADELPHIA (CBS) – A fire broke out late Sunday night at an apartment building in the Kensington section of Philadelphia.

The one-alarm fire was reported around 11:30 p.m. in a three-story apartment house along the 3400 block of Kensington Avenue. Firefighters were able to control the blaze after about 30 minutes.

Four people were taken to Temple University Hospital for treatment.

The cause of the fire remains under investigation.