A Facebook user shared alarming video of vehicles becoming part of a deadly chain reaction crash in Fort Worth, Texas, on Thursday morning.

The crash happened during icy road conditions on I-35W in the downtown Fort Worth area on Thursday morning.

Authorities believe that as many as 100 vehicles, including multiple semi trucks, were involved in the pileup.

Police have confirmed that five people lost their lives in the crash. Thirty-six other people have been taken to hospitals, some with serious injuries.

Facebook user Randle Kip Smith shared dramatic video of the pileup as it occurred, which you can view below.

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