Biden pledges to “move heaven and earth to… rebuild the bridge as soon as humanly possible” – and said the federal government would pay

Rescuers pulled out two survivors and searched for at least six people who were still missing in the Patapsco River after the 1.6-mile Francis Scott Key Bridge was turned into a pile of twisted metal.

Brandon Scott, the mayor of Baltimore, called it “an unthinkable tragedy” and described the scene as “like something out of an action movie”.

The bridge carried 31,000 cars a day – 11.3 million vehicles a year – across the city harbour, and was the main interstate highway for drivers between New York and Washington who sought to avoid downtown Baltimore. It was opened in 1977 and was named after the author of the US national anthem, “The Star-Spangled Banner”.

Mr Biden said the US Coast Guard had responded quickly to a mayday call from the ship, and commended the fast action of Maryland officials who shut the bridge to traffic before it was struck and “undoubtedly saved lives”.

The port remains closed while rescue efforts are under way, and could be blocked indefinitely until the missing vehicles and the wreckage of the bridge are recovered. The disaster could be the worst US bridge collapse since 2007, when the I-35W bridge in Minneapolis collapsed into the Mississippi River killing 13 people.

The National Transportation Safety Board was reported to be sending a team to investigate, though there is no suggestion of foul play.

The Dali had been chartered by the Danish shipping company Maersk. “We are horrified by what has happened in Baltimore, and our thoughts are with all of those affected,” Maersk said. The Port of Baltimore is the busiest in the United States for car shipments, handling at least 750,000 vehicles in 2023. Ford’s chief financial officer John Lawler said the collapse would force the company to make changes to its operations. “It’s going to have an impact,” he told Bloomberg. “We’ll have to divert parts to other ports... It will probably lengthen the supply chain a bit.”

The port handles imports and exports for major firms including Nissan, Toyota, General Motors, Volvo, Jaguar Land Rover, and the Volkswagen Group, which owns luxury car brands Audi, Lamborghini and Bentley.

General Motors and Ford Motor said they will reroute affected shipments, but the companies said the impact will be minimal.

More than 40 ships remain inside Baltimore port, including small cargo ships, tug boats and pleasure craft, according to data from ship tracking and maritime analytics provider MarineTraffic.