Chattanooga Fire Department Lt. Evan Rose, right, instructs his men before they approach a live gas leak in the 1400 block of Market Street.Update: The gas leak has been shut off.
The Clark Building, a mixed-use building on Market Street, has been evacuated as Chattanooga Gas Company crews work to repair a gas leak. Market Street from 14th Street to Main Street is estimated to be closed until 11 a.m. today.