BOSTON (CBS) – Several crashes were reported during a snowy Thursday morning commute, included a jackknifed tractor-trailer that caused delays in Andover.

The tractor-trailer crashed on Interstate 93 South near Exit 42.

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A jackknifed tractor-trailer on Interstate 93 in Andover. (WBZ-TV)

Two lanes were blocked as a result of the crash, resulting in backups.

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Other spinouts were reported throughout the region.

A tractor-trailer also crashed into the median on Interstate 495 South in Chelmsford.

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After a snowy start to the day, conditions are turning into sleet and freezing rain, which could cause some slick spots later in the day.