There is major train disruption between Birmingham New Street and Wolverhampton due to an emergency incident.
National Rail said emergency services were dealing with an incident on Thursday morning, with all lines closed while they carried out work.
As a result, trains running between the stations may be cancelled, revised or delayed by up to 60 minutes, while some services may be diverted.
Disruption is expected until 11:00 GMT.
Passengers will be able to use their tickets on West Midlands Metro services between Grand Central and Wolverhampton, and West Midlands Railway services between Wolverhampton and Stafford, at no extra cost.
For Avanti West Coast customers, services may be diverted via Bescot Stadium and will not call at Sandwell & Dudley.
West Midlands Ambulance Service have been contacted for comment.