Firefighters responded to the fire Tuesday afternoon in the 3200 block of East 95th Street, Chicago fire officials said.
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The structure of the building had extensive damage, but no injuries were reported, CFD said.
The Chicago Police Department said the fire was caused by an electrical issue. The determination was made by the CFD Office of Fire Investigation.
The business issued a statement about the fire.
"We have suffered a fire on our roof area and will be temporarily closed till we can access all the damage and start our repairs," the statement read. "We are thankful no customers or employees were hurt. We wish you a happy thanksgiving and will do our best to open as soon as possible. Thank you all for the great support you have sent us in these trying times."
"Calumet Fisheries" is a famous seafood spot along the Calumet River.
The restaurant had just reopened last week after it was shut down at the end of October for failing a city health inspection.
Calumet Fisheries reopens after failed city health inspection
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Officials said they found evidence of rodents, including more than 100 mouse and rat droppings.
At the time, the city said the business needed to clean up grease and food debris and hire an exterminator before it could reopen.
SEE ALSO | Calumet Fisheries manager Carlos Rosas dies from COVID-19 at 41