Northern is warning rail users to expect disruption to train services this afternoon (Thursday) after a landslip was discovered between Shipley and Ilkley.
Services are unable to run in both directions between Ilkley and Bradford Forster Square on the Wharfedale Line.
A replacement bus services has been arranged to run between Guiseley and Shipley.
Services between Ilkley and Leeds, and Leeds and Bradford Forster Square are not affected.