HOLYOKE (AP) -- A three-alarm fire at a Holyoke apartment building has forced as many as 80 people out of their homes.

Two firefighters suffered minor injuries in the blaze on Elm Street that was reported at about 4 a.m. Monday. No residents were reported hurt.

The cause remains under investigation, but fire investigators say the blaze appears to have started on a fourth-floor porch.

The blaze was so intense at one point all firefighters were ordered out of the building.

The four-story building had 30 to 40 units and more than a dozen of those displaced were children.

Authorities say residents of some apartments not too badly damaged may be allowed back in at some point to find valuables.

The Red Cross is helping those displaced.