UPDATED 03/21/11 11:23 a.m.

CHICAGO (CBS) — Investigators are trying to determine the cause of an extra-alarm fire, which swept through three buildings in the Englewood neighborhood Monday morning.

A 2-11 alarm was called for the blaze in the 7200 block of South Green Street at 6:45 a.m., but no injuries or hospital transports have been reported as of about 7:20 a.m., Fire Media Affairs spokesman Will Knight said.

The fire spread to three buildings, Knight said, including: a two-story brick building at 7216 S. Green St., a 1 1/2-story frame building at 7214 S. Green St. and a 1 1/2-story frame building at 7224 S. Green, St.

Firefighters rescued three people.

One firefighter was taken from the scene to Northwestern Memorial Hospital, and was reported in stable condition, Knight said.

Firefighters say the warmer weather meant fire hydrants were clear of ice, which made fighting the blaze easier.

“There was a lot of fire in the original fire building,” said Fire District Chief Jeffrey Springer. “That’s why the fire quickly spread. So our guys did a nice job of advancing the hose lines and protecting, so this fire didn’t spread any further than it did this morning.”

The fire was extinguished shortly before 8 a.m.

The American Red Cross of Greater Chicago is helping 27 people who were displaced by this morning’s fire.

The Sun-Times Media Wire contributed to this report.

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