The operations director at ScotRail has paid tribute to two members of staff who lost their lives in the Stonehaven rail crash - and a third who raised the alarm.
Three people died on the Aberdeen to Glasgow service yesterday morning, including the driver and the conductor.
British Transport Police says they have yet to be formally identified.
Speaking to Original 106, David Simpson from the operator said: "Colleagues across Scotland's railway, and in the wider rail industry, are still feeling shocked and stunned over what happened yesterday.
"Losing two colleagues in such tragic circumstances, and of course a customer, is really hard to take.
"We're making sure we support colleagues across the business, particularly those who are directly affected, as we come to terms with what was a really tragic situation for everyone involved.
"Colleagues are paying tribute to the staff involved, both those who lost their lives and another member of staff on board who was able to raise the alarm following the incident.
"All are dedicated members of staff, and it's tragic that a driver and a conductor have lost their lives in these circumstances.
"The staff member who raised the alarm was travelling on the train, and was able to get to an adjacent signal box to raise the alarm after the incident.
"Obviously their account of events will be critical in establishing what happened, and that will be a key element of the investigation process.
"Again I would pay tribute to the actions of that member of staff, following what must have been an extremely bad experience being involved in the actual incident."
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