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Fiery crash jams traffic hours before Boston Marathon

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BOSTON (WTVR) – A tractor-trailer fire along the Leonard P. Zakim Bunker Hill Memorial Bridge jammed traffic along Interstate 93 North in Boston hours before the start of the Boston Marathon.

The fire was the result of a crash between the tractor trailer and another vehicle, CNN reported.  One person suffered serious injuries in the crash, Massachusetts State Police told WBZ.

Black smoke from the accident scene could be seen for miles around Boston.