UPDATED 08/22/11 10:42 a.m.

CHICAGO (CBS) — A man was hospitalized early Monday after being severely burned in a fire in the Lincoln Square neighborhood, just steps from the North Branch of the Chicago River.

The fire broke out around 3 a.m. at 4764 N. Virginia Ave., according to Fire Media Affairs. A still-and-box alarm and EMS Plan I — which automatically sends five ambulances – were called for the blaze.

The man, whose age wasn’t immediately known, suffered burns to more than 75 percent of his body, according to Fire Media Affairs. He was taken to Swedish Covenant Hospital in critical condition.

Two other people refused medical treatment, Fire Media spokesman Richard Rosado said.

About 70 firefighters were sent to the fire, he said.

The Red Cross sent responders to assist people affected, according to the agency’s official Twitter feed.

Dispatch reports indicated that the fire was confined to the first floor of the four-story apartment building.

The Sun-Times Media Wire contributed to this report.

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