At least six people have been killed and nine others hurt after a footbridge collapsed near Florida International University in Miami on Friday.
Police announced the deaths after rescuers spent the night searching for victims trapped beneath the 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 collapsed a few days after it was built over southwest 8th street allowing people to bypass the busy street to reach Florida International University on March 16, 2018 in Miami, Florida.
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.
Announcing the deaths early on Friday, Miami-Dade police spokesman Alvaro Zabaleta said the operation was now moving from rescue to recovery. Workers at the site were having to take extreme care because of the possibility of finding more victims and for their own safety.
The Florida Highway Patrol said several people were killed, according to US networks. Emergency vehicles and police cars swarmed the area.
Eyewitnesses told local media that vehicles were stopped at a traffic light when the structure collapsed at about 13:30 local time (17:30 GMT).
One witness told ABC News that the screams coming from the cars were "terrifying".
"As soon as I looked outside, I saw dust flying everywhere," Tiona Page said. "I knew the bridge had collapsed."
Another witness, Damany Reed, told CBS News: "I heard a big kaboom... it sounded continuous. We look outside... we thought something had fallen but it was the bridge that collapsed. It was just surreal at that moment and pretty scary."
"I saw there were multiple cars crushed under the bridge. It was just terrible," Jacob Miller, an FIU student, was quoted as saying by the Associated Press.
At the White House, Press Secretary Sarah Sanders said President Donald Trump was aware of the accident and will offer “whatever support is needed.”
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