The French railway operator SNCF has ordered safety checks across its network after a train crash near Paris which killed six people and injured 30.
The intercity train had just left the French capital on Friday and was on its way to Limoges when it derailed at Bretigny-sur-Orge and crashed into a station platform.
A track fault is suspected of causing the crash with rail company SNCF saying two rails had become detached outside the station.
"It moved into the centre of the switch and in this position it prevented the normal passage of the train’s wheels and it may have caused the derailment," said Pierre Izard, SNCF’s general manager for infrastructure.
French media are reporting that it could still take a number of days to clear the derailed cars.
President Francois Hollande has called for "much more" to be done to maintain the rail network.
Hollande told French TV more effort must go into conventional lines, with the priority on the regional network, in an interview following the annual Bastille Day.
SNCF said 385 passengers were on board when the train crashed and the station platforms were crowded.
