A train carrying Republican lawmakers to a retreat in West Virginia has collided with a truck.
Republican passengers – who included House Speaker Paul Ryan – said no one aboard the Amtrak train had been significantly injured.
But Arizona Senator Jeff Flake told CNN he believed one person on the lorry was killed by Wednesday morning’s impact.
Utah Senator Mike Lee said that what appeared to be a “garbage truck” was “cut in half”.
Security officials and doctors for the lawmakers – as well as two congressmen who are ex-doctors – were helping emergency officials, lawmakers said.
According to a spokesman for Amtrak, the crash occurred at 11:20 local time (16:20 GMT) near Crozet, Virginia, about 110 miles (180km) south-west of Washington DC.
They add that local law enforcement officials were investigating “and inspecting the equipment for damage”.