iStockRail services between Glasgow and Aberdeen have been cancelled or delayed after a staff member fell ill.
Network Rail confirmed services have been disrupted after a member of signal staff had taken ill on Wednesday morning.
As a result, the line between Laurencekirk and Stonehaven has been closed until further notice.
The closure has affected journeys between Glasgow Queen Street and Aberdeen, as well as Aberdeen and Montrose.
ScotRail also noted that services between Edinburgh and Aberdeen may be revised due to the incident.
The rail operator said the disruption is expected to last until around 1pm.
Phil Campbell, ScotRail customer operations director, said: “We’re sorry to customers who have experienced disruption to their journey this morning.
“Anyone delayed by 30 minutes or more is entitled to claim compensation through our Delay Repay Guarantee.”
A spokesperson for Network Rail said: “Train services between Montrose and Aberdeen are now returning to normal following earlier disruption, which occurred after a member of our signalling team became unwell.
“We worked closely with ScotRail and other operators to restore services as quickly and safely as possible. We’re grateful to passengers for their patience and understanding.”
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