A tree on the line between Diss and Norwich is causing delays for rail passengers.
Rail provider Greater Anglia have reported a bus replacement service is being prepared between Diss and Norwich, while some services between Liverpool Street and Norwich may be cancelled.
There will be no trains running between Norwich and Diss until further notice.
Services are currently being terminated at Diss, with buses on route to the station.
It is believed engineers are on their way to the scene to try and resolve the problem.
For more information, visit www.greateranglia.co.uk or follow @greateranglia on Twitter.