Two people were injured and 26 more were displaced from 12 apartment units Monday night when a fire roared through the third floor of an apartment building in east Colorado Springs, according to city officials.

The single-alarm fire at the Shannon Glen Apartments, 260 N. Murray Blvd., was first reported at 8:30 p.m. and heavy smoke and flames were visible when fire crews arrived six minutes later, said city spokeswoman Kim Melchor.

At least one person had to be rescued from a third-floor apartment and two people were taken to a local hospital for minor injuries, Melchor said.

More than 50 firefighters and numerous pieces of equipment, including engines, hazmat, heavy rescue and support personnel, battled the fire, Melchor said.

Residents were allowed to return to their apartments about 2 a.m., but there was no word about when the occupants in the damaged units would be allowed to reenter their homes.

Red Cross representatives worked with each of the 26 residents to help them find housing overnight, several were placed in vacant apartments and others stayed with relatives, according to spokesman William Fortune.

The cause of the fire and the extent of the damage to each unit remained under investigation, Melchor said.

"We'll know the extent of the damage probably later (Tuesday), but 12 units were impacted in some way, either by smoke or water damage," Melchor said.