MANSFIELD, La. - A fatal traffic accident prompted the closure of all northbound lanes of Interstate 49 in DeSoto Parish early Wednesday, according to the DeSoto parish Sheriff's Office.

The crash occurred amid extremely dense fog, which significantly reduced visibility in the area.

The accident happened near the 162 mile marker on the far south end of the parish. Authorities confirmed the crash resulted in at least one fatality.

The sheriff's office said calls about the first crash came in around 4:15 a.m. An overturned 18-wheeler overturned and a chain reaction crashes followed, including a pickup truck that ran into the rear of another 18-wheeler.

The Louisiana Department of Transportation and Development closed I-49 northbound lanes immediately following the crash.

Motorists were

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