A US passenger train that derailed, killing three people, was travelling at 80mph (130km/h) on a curve with a speed limit of 30mph, data from the train’s rear engine indicates.
It happened in Washington state during rush hour on Monday and officials say 72 people were taken to hospital.
A number of those injured are reported to be in a serious condition.
Authorities said all carriages had now been searched, but would not rule out a rise in the number of dead.
A spokeswoman for the National Transportation Safety Board (NTSB) said investigators had arrived at the scene on Monday night local time and would probably be there for a week or 10 days.
Bella Dinh-Zarr said the 12-carriage train had engines at the front and rear. The back engine’s data recording had been retrieved, she said, and “preliminary indications are that the train was travelling at 80mph on a 30mph track”.
“Our hearts go out to everyone who is affected by this very tragic accident,” she said.
