A motorcycle crash has closed Route 8 north in Shelton on Sunday.
State Dept. of Transportation officials said the highway is closed between exits 11 and 12. Congestion is building in the area between exits 9 and 12.
A vehicle and a motorcycle are involved in the crash, according to CT Travel Smart.
Authorities have not released details on any possible injuries.
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There's no word on when the highway will reopen.