Rail services will be disrupted for several days after a freight train derailed at Sheffield station, Network Rail said.
The 34-wagon train, which was carrying cement, came off the track in the early hours of Wednesday morning.
Network Rail said it was travelling at a “slow speed” when the derailment happened. No-one was injured.
The train was travelling from Hope, Derbyshire, to Dewsbury, West Yorkshire, when it came off the tracks as it passed through the station.
A day later, there is still major disruption to passenger services, which is expected to continue in the "coming days" as engineers attempt to remove the train, which will require the use of cranes.
Northern and East Midlands Railway services will continue to be disrupted on Thursday, but CrossCountry and TransPennine Express expect to operate full timetables.
The arrival of the cranes will also require a partial road closure on the A61, which runs in front of Sheffield station.
Once the train is removed, engineers will carry out “substantial repairs” to the tracks and signalling system, which suffered “significant damage”.
An investigation into the derailment has been launched by the Rail Accident Investigation Branch.
Network Rail route director Matt Rice said: “This is a significant incident, so it’s only right that we take time to find out all of the facts and understand what has caused this.
“Once it is safe to do so, we will start work to remove the train, better assess the extent of the damage and make a plan for repairs.
“This process is taking some time and we are sorry for the disruption which this is causing. There will still be service changes tomorrow (Thursday) and over the coming days.
“We urge anyone planning to travel to, from or via Sheffield to check before travelling.”
The derailment of a freight train near Llanelli, South Wales, on August 26 led to the spillage of 330,000 litres of fuel, causing a huge fire.
