(Portland, Maine) - Fire officials are still looking for the cause of the Saturday morning fire in Portland that claimed 5 lives and left one person hospitalized.

The blaze hit a 2-unit apartment building near the University of Southern Maine, but officials say none of the victims were students there.

Autopsies were conducted Sunday on the victims, but their identities have not been released. 29 year old Steven Summers of Rockland survived the fire, but is at Mass General Hospital in Boston with severe burns. He had been visiting friends at the house that hosted a Halloween party Friday night.

Maine fire officials say it could be several days before the cause of the fire is know.