Officials in Miami say several people have been killed and cars crushed when a newly installed pedestrian bridge collapsed onto a highway on Thursday.<br /> Florida Highway Patrol says at least five vehicles are trapped under massive slabs, with search and rescue operations underway. <br />It added that it does not have an exact death toll. <br />Construction of the 950-ton bridge was finished last Saturday, connecting Florida International University and the city of Sweetwater.<br />It hadn't yet opened to foot traffic. <br />
