A landslide has blocked a train line in the north of Sussex.
According to Southern Rail, the incident was confirmed in the East Grinstead area recently.
A statement on its website said: "This means it is unsafe for trains to operate until the relevant repairs and investigations have taken place.
"Therefore, no trains will run between Hurst Green and East Grinstead. Network Rail are in the process of conducting their investigations to find out the extent of the issue."
The Hurst Green it referred to was in Oxted, Surrey, rather than in the Rother district of East Sussex.
Trains are not running to Lingfield, Dormans and East Grinstead as a result, and passengers are being warned that their journeys will be extended by 90 minutes, with some rail replacement buses in operation.
This afternoon (December 29) Network Rail confirmed the land was no longer slipping, and test trains would be sent through.