Excerpts from abc7chicago.com:

Chicago firefighters responded to an extra-alarm fire at a grocery store in the Chinatown neighborhood Wednesday morning.

The fire broke out at about 3:30 a.m. in the Park To Shop grocery store in the 2100-block of South Archer Avenue. 

There were no reports of any firefighters suffering from heat fatigue and no injuries have been reported.

The fire department had trouble putting out the fire due to the building’s concrete roof. 

The Chicago Building Department was called in to help open up walls to gain access.

At about 6:45 a.m., CFD said the fire was struck out. The cause of the fire is under investigation.