They know where it's coming from but they don't know what it is, Department of Transportation officials say about a mystery odor in downtown Hartford.
Officials know the odor is coming from a DOT pump station directly behind the Convention Center and it appears the odor can be traced to a manhole at the pump station.
fficials are calling this "a hazardous material event ," the Department of Environmental Protection took a water sample and other tests are being conducted.
The rear section of the convention center was evacuated as a precaution and ramps to Interstate 84 were shut down. No injuries were reported.