The moment the FIU pedestrian bridge collapsed (video)

At least six people were killed and many rescued after a pedestrian bridge under construction near Florida International University in Miami collapsed on Thursday.

Eight cars were crushed in the collapse. The total death toll was still to be determined, as crews continued to work through the night in an attempt to get to the vehicles trapped under rubble.

Miami-Dade fire chief Dave Downey confirmed that there were at least four fatalities, including a student from the university. Nine others were pulled out of the debris and taken to a local hospital, including two who were immediately rushed into surgery.

It's not clear what caused the bridge to collapse. Known as an "instant bridge," the structure was assembled on the side of the street and put into place on Saturday in a process that took less than six hours. Still under construction, the bridge wasn't scheduled to open to foot traffic until next year.