Trains passing through Whitchurch and Wem face cancellations after a points failure on the line.
Transport for Wales has confirmed that a fault in Nantwich this morning (Wednesday, April 15).
They expect the incident to continue until 1.30pm, with services disrupted until 2.30pm.
This could cause services to be delayed by up to 30 minutes or possibly cancelled between Crewe and Shrewsbury.
Transport for Wales added: "We have been made aware of a points failure at Nantwich.
"As a result, train services will not be able to run from Crewe to Shrewsbury until the points have been fixed.
"Our services will be diverted from Crewe to Shrewsbury via Chester. This means that services from Crewe towards Nantwich, Wrenbury, Whitchurch, Prees, Wem and Yorton will be cancelled until the issue is rectified.
"Our colleagues at Network Rail are aware of the problem and technicians are currently en route to the affected area.
"We will publish more information here, once we have received an update from the infrastructure technicians.
"Please check back shortly. We apologise for the disruption caused to your journey."
In the interim buses are running between Crewe and Shrewsbury.
TfW added: "We have organised buses to run between Crewe and Shrewsbury to help you complete your journey, at no extra cost. These will arrive at Crewe at approximately 12.42pm provided by Lakeside.
"These arrangements are in place on services until 3.00pm.
"Road transport will take longer than rail services. Please allow extra time to complete your journey."
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