2 seriously injured in South Side apartment fire: CFD

CHICAGO (WLS) -- Two people were seriously injured in a South Side apartment fire Tuesday evening, Chicago fire officials said.

Chopper 7 was over the scene about 5 p.m. There were large flames and black smoke coming from the Chatham building near 79th Street and Calumet Avenue.

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There was a large emergency response in the area. Some roads appeared to be blocked off.

A CFD official said two male victims were taken to a local hospital in serious-to-critical condition after the fire, which started on the second floor and spread to the third.

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It was not immediately clear what caused the fire.

Chicago fire officials said just after 5:20 p.m. that the fire had been extinguished.

This is a developing story; check back with ABC7 Chicago for updates.