One lane of Interstate-91 north is closed in Wallingford because of a tractor trailer fire.
The Department of Transportation said the closure is between exits 14 and 15 and involves the right lane.
More than 3.5 miles of congestion was reported starting at exit 12.
There's no word on what sparked the fire or if anyone was hurt.
State police temporarily shut the entire highway down for a short time earlier Thursday morning.
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