A Miami university bridge that collapsed and killed six people while under construction had basic flaws that should have been caught before it was built, federal officials said.

The National Transportation Safety Board also faulted the firms involved in the project and Florida International University for failing to act once extensive cracking appeared during construction of the pedestrian bridge. The agency said they should have halted work and shut down the road beneath it before the concrete span smashed eight cars on March 15, 2018. Ten other people were injured in the disaster.