At least four people have been killed and 10 others hurt after a footbridge collapsed near Florida International University in Miami, officials say.
Rescuers are spending the night searching for victims trapped beneath the buckled structure.
The 862-tonne, 174ft (53m) bridge fell over an eight-lane motorway on Thursday afternoon, crushing at least eight vehicles, police said.
The bridge was erected on Saturday in just six hours.
It was built using a method called “accelerated bridge construction” to avoid traffic disruption. A major section of the bridge was assembled on the side of the road and then raised into place.
Miami-Dade Fire Chief Dave Downey confirmed on Thursday night that at least four people were killed.