Security footage shows the moment a newly installed pedestrian bridge collapsed at Florida International University in Miami, killing at least six people. Authorities said Friday that the cables suspending a pedestrian bridge were being tightened when the 950-ton concrete span collapsed over traffic, killing at least six people only days after its installation was celebrated as a technological innovation.“This is a tragedy that we don’t want to re-occur anywhere in the United States,” said Juan Perez, director of the Miami-Dade police. “We just want to find out what caused this collapse to occur and people to die.”A Florida International University student was among the fatalities, and several construction workers were among the 10 people injured. One person died at a hospital, and Perez said five bodies were located with the help of cameras but not yet retrieved from vehicles crushed under the immense slab. No identities have been released.“We’re not even going to talk numbers anymore because we expect to find other individuals down there,” Perez said.The footage is featured at the beginning of the video above