A day after the Interstate 35W bridge collapsed into the Mississippi River and its banks in Minneapolis, footage of the terrible accident surfaced and gave people across the world a glimpse of a disaster that happened in a few seconds.

The dramatic images were captured by a security camera placed along the river and showed how a 40-year-old gigantic structure crumbled in a little more than four seconds.

This video recording could prove to be an essential evidence in the investigation began in order to determine the cause of Wednesday’s crash.

At 6:01:38 PM, CDT the bridge linking the Minneapolis neighborhoods of Downtown East and Marcy-Holmes came crumbling down in the river bellow and on its banks, taking down with it more than 50 cars and their occupants.

People stranded on the debris and vehicles on fire, completed an apocalyptic image that shook the nation.

The official death toll remained at four and at least 79 injured, authorities lowering the number of casualties as searches pushed forward. Unfortunately the divers’ operation is hampered by poor visibility and large pieces of concrete and twisted steel displaced by the strong currents.

“[We] don't have a hard understanding of how many vehicles are underneath the bridge and that won't be known until there's an opportunity to get some heavy equipment in to move the bridge or portions of it,” Minnesota Governor Tim Pawlenty said.

Latest reports indicated that divers found 11 vehicles on Thursday, but eight people are still missing probably trapped under the massive blocks of steel-enforced pavement.

About 750 bridges with similar features as the eight-lane I-35W are going through a thorough inspection these days, following a call from Transportation Secretary Mary Peters.

These inspections were prompted by reports that the 579-meters-long bridge was “structurally deficient,” but remained in use as it was the state’s busiest with approximately 141,000 vehicles crossing it daily.