A human error did not cause a train to derail outside Paris that left six people dead, the French transport minister said.
The train, which left the French capital on Friday night, jumped the track just a few miles into its journey as it traveled through a small town station.
Transport Minister Frederic Cuvillier said it was unclear what caused France's deadliest crash in years but he added that authorities were looking into a possible error in the switching system - which guides trains from one track to another.
Mr Cuvillier said 30 people were injured after the crash and that it was impossible to know whether anyone was still trapped in the carriage until it is lifted.
More top news
Team Sky's Chris Froome is set to win the 2016 Tour de France with an overall lead of four minutes 11 seconds after stage 20 to Morzine
The attempted kidnap of an RAF serviceman took place near RAF Marham, in Norfolk, on Wednesday.
Footballer Marc Crosas faces an investigation after pictures emerged of him appearing to have speared an endangered baby shark