A pedestrian bridge that was under construction collapsed onto a busy Miami highway Thursday, crushing at least eight vehicles under massive slabs of concrete and steel and killing multiple people

The 950-ton (860-metric ton) bridge had been assembled by the side of the highway and moved into place to great fanfare.

Here in this dash cam footage, you can see the moment the bridge collapsed. Please be warned that this is difficult to watch. The moment was really shocking. The onlookers described this happened suddenly with a blink of an eye. The span stretched almost 200 feet (60 meters) to connect Florida International University with the city of Sweetwater. It was expected to open to foot traffic next year.

Onlookers watched on in terror as the bridge carrying students and other pedestrians crumbled into the street directly on top of multiple cars that were stopped under it while waiting at a light. Search-and-rescue crews drilled holes into the debris and used dogs to look for survivors. They had to work carefully because part of the structure was still unsafe. At least 10 people were taken to hospitals. The number of fatalities was not immediately known.

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