(KMOV) -- A Budweiser semi truck toppled over in St. Clair County, causing a traffic nightmare for hundreds of drivers heading into downtown St. Louis Wednesday morning.
The truck wrecked on westbound Interstate 55/70 just west of the merger with Interstate 64 around 5:40 a.m.
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Only one westbound lane was getting by until another lane reopened at about 7:20 a.m. Traffic at one point was backed up for several miles.
It was unclear if the driver of the truck suffered injuries.
The cause of the wreck was not immediately known.