Trains have been cancelled after flooding on the South Wales mainline.
Great Western Railway confirmed the line between Newport and Cardiff Central closed at about 8.45pm on Wednesday.
A spokesman said the track is flooded around the Rhymney River and the operator is waiting for the water level to lower.
The Rhymney River intercedes with the South Wales mainline between Rumney and Tremorfa in Cardiff.
A number of services have been cancelled, delayed, or revised.
This includes services to Ebbw Vale Town, Great Western Railway said.
Disruption is expected until the end of the day.
One commuter said her train from London stopped for a period between Newport and Cardiff before being forced to return to Newport.
A GWR spokesman said: "The line is currently closed because of flooding we are working on alternatives currently.
"It's Rhymney River causing the issue, as things stand we are waiting for the water level to lower."
