PITTSBURGH — Investigators are working to pinpoint the cause of a fire this morning that killed two people in Friendship.

Authorities say the fire was in a house that was subdivided into apartments and that the fire was reported about 2 a.m. today.

A man and woman were trapped during the fire. One was found dead at the scene while authorities said the other died a short time later at a city hospital.

At least one other family lived in the building but managed to get out safely.