Rail passengers are facing major delays and cancellations due to "severe" overhead wire damage just north of York.
All lines have been blocked between York and the North East, affecting LNER, TransPennine and Grand Central services.
Replacement buses are being laid on and Network Rail has told ITV Tyne Tees the disruption is likely to last several hours, until the end of the day.
LNER train service has advised customers to "defer travel to tomorrow" if possible. Ticket restrictions have been relaxed and will be honoured for travel on 3 December.
Hundreds of passengers are queuing around Darlington station in an attempt to continue their onward journeys.
This footage was taken just a short while ago.
These images were taken at York station, after the incident was first reported at 2pm this afternoon.
Hundreds of passengers were stuck on standstill trains.
Paul Rutter, Route Director, East Coast for Network Rail said: