A train carrying 66 passengers and three crew has struck a landslip causing severe disruption to services.
The 12.56pm train from Glasgow Queen Street to Oban hit a landslip between Oban and Crianlarich at around 1.30pm on Wednesday.
Scotrail confirmed that the four-carriage train did not derail and that there were no reports of injuries to passengers or train crew.
Passengers were transferred into the rear two coaches of the train which returned to Oban.
The incident has caused severe disruption to train services between Glasgow Queen Street and Oban.
Many services have been delayed and cancelled last minute.
A replacement bus service was also in operation between Crianlarich and Oban.
A spokesman from Network Rail said that emergency response teams had been sent out but he did not have a time for when services would return to normal.
A ScotRail spokeswoman said: "Passengers were transferred into the rear two coaches, which returned to Oban. We have arranged onward transport so that people can continue their journeys."
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