Lanes of northbound I-55 closed near downtown St. Louis after semi crash

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ST. LOUIS, MO (KTVI) - Several lanes of northbound I-55 at 7th street are closed after a serious accident. Several tractor trailers were involved in the crash. Traffic is backed up near downtown St. Louis.

There is no word on injuries at this time. It appears that crews are trying to rescue a driver from the cab of one of the trucks. There are several emergency vehicles at the scene of the accident.

One lane of traffic is getting by the crash.  It is not clear when the trucks will be cleared from the highway.

It is not clear what caused the crash.

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