20 Homeless after Three Alarm Fire 

Twenty people are homeless after an overnight three alarm fire on Congress Street in Portland.Crews were called just after midnight Sunday. Before firefighters were able to contain the fire, it spread to a second apartment building.It took some 60 firefighters to put the fire out.Investigators say it could take up to a week to figure out what caused the fire, though officials say it started in the back of the building.Three firefighters suffered minor injuries, and all the tenants made it out safely. The Red Cross is now helping the tenants out.