BOSTON (WHDH) - A crash involving a jackknifed tractor-trailer has shut down the westbound side of the Massachusetts Turnpike in the area of Allston and Brighton.

State police tweeted a photo of the truck blocking all travel lanes. It’s wedged between guardrails on both sides of the highway.

There was no immediate word regarding injuries to those involved in the crash.

Heavy rain made for slick roadways across the region during the morning commute.

Traffic is backed up for miles. Motorists are urged to avoid the area until further notice.

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