WESTON (CBS) – A tractor-trailer jackknifed on the Mass Pike on Monday afternoon, causing traffic delays.

It happened on the westbound side of the road in Weston.

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A jackknifed tractor trailer on the Mass Pike. (WBZ-TV)

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The right two lanes of the Mass Pike were closed to traffic following the crash.

It is not known how long the closures will be in place.

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Massachusetts State Police did not say if anyone was injured in the crash.