Four Chicago (IL) firefighters were injured when a stairway collapsed while they were fighting an extra-alarm fire in a three-story apartment building during which officials had to call for an emergency “mayday” response, reports the Chicago Tribune.

About 200 firefighters responded when the fire was soon raised to a 2-11 alarm, said Deputy District Chief Lynda Turner.

The four firefighters — three men and a woman — sustained injures when they were on a stairway connecting the second and third floors that collapsed.

“We pretty much had the fire under control by the time the stairwell collapsed,” said Turner.

Two of the firefighters sustained smoke inhalation and two firefighters minor injuries, according to Fire Department and police officials. Turner said the injuries were mostly “bumps and bruises.” All were in good condition and taken to Trinity Hospital, according to a Fire Department spokesman.

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