A freight train has hindered near Sheffield, triggering cancellations and delays throughout northern England.
Several carriages of the train came off the tracks in South Yorkshire at around 3am on Wednesday, rail operator Northern stated.
Nobody was hurt, however the derailment has led to damage to signalling equipment, it added.
CrossCountry, East Midlands Railway, Northern and TransPennine Express services are all experiencing cancellations and hold-ups.
All lines through Sheffield are likewise obstructed, according to National Rail Enquiries.
It is unclear when services will be back to normal, but engineers are working to clear the train, they said.