Train fault blocks lines at Craven Arms leading to warnings of delays and cancellations
A fault on a train on the Hereford - Shrewsbury line meant the blockage of some lines at Craven Arms.
A spokesman for Transport for Wales said: "A fault on a train at Craven Arms means some lines are currently blocked.
"Trains running between Hereford and Shrewsbury may be cancelled, delayed by up to 50 minutes or revised."
Disruption was expected until 9.30pm on Tuesday.