WESTBORO, MASS. (WHDH) - An overturned tractor-trailer snarled traffic on Interstate 495 in Westborough on Thursday afternoon.

Emergency crews responded to a report of a crash on the highway near Route 9 and found a wrecked white truck resting on its side, according to the Westborough Fire Department.

There was no immediate word on injuries to the truck driver.

Motorists were being urged to seek alternate routes as crews work to clear the crash.

The road has since been reopened.

The cause of the crash is not clear.

This is a developing news story; stay with 7NEWS for updates online and on-air.

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