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An investigation has begun into an Aberdeenshire rail crash in which three people died.
The driver and a conductor - named locally as Brett McCullough and Donald Dinnie - died along with a passenger when the 06:38 Aberdeen to Glasgow service derailed near Stonehaven.
The train is thought to have hit a landslide after rain and thunderstorms caused widespread disruption.
Six other people were also injured in the incident.
They were taken to hospital but their injuries were not believed to be serious.
Kevin Lindsay, Scotland organiser for the train drivers' union Aslef, said the tragic accident had affected everyone in the railway family.
"Brett thought the world of his family, and his colleagues thought the world of him," he added.
Investigators are now working to identify the cause of the crash, which was reported at 09:43.
British Transport Police, the Rail Accident Investigation Branch and inspectors from the Office of Rail and Road - the independent regulator - are involved in the investigation.
'Intense localised weather'
Scotland's Transport Secretary Michael Matheson arrived at the site of the crash on Thursday morning.
Responding to media reports that inspectors were warned about a rise in landslips in the weeks before the crash, Mr Matheson told BBC radio's Good Morning Scotland programme that they would look at conditions in the run up to the crash.
He said: "What I do know is that the rail network are experiencing increasing challenges across different parts of the routes - not just here in Scotland but right across the UK due to what is an increasing number of very intense localised weather events that have a significant impact on the infrastructure that they have within the rail network."
Image caption Michael Matheson spoke to police on Thursday morningMr Matheson said in recent years there had been "significant incidents", including last year when part of the West Highland line was washed away just outside Crianlarich following an intense downpour.
He added: "And we saw just over the course of the night from Tuesday into Wednesday morning, some parts of the country have a month's rainfall in the course of a couple of hours."
UK Transport Minister Grant Shapps also plans to travel to the scene of the incident later.
He said he wanted to "try to understand the situation first hand and offer every possible assistance".
The chief executive of Network Rail, Andrew Haines, is also expected to travel to Stonehaven after cutting short a family holiday in Italy.
Image caption Photographs from the scene showed damaged carriages lying across the trackOfficials have pledged to find out what caused the train to derail near Stonehaven, killing three people and injuring six others.
The 6.38am Aberdeen to Glasgow Queen Street service derailed on Wednesday morning amid heavy rain and flooding.
Speaking on the BBC's Good Morning Scotland radio programme, ScotRail's managing director Alex Hynes, said: "Yesterday was a devastating day for everybody who works in the rail industry in Scotland.
"Our love and support is sent to the victims of this accident and their families, those that were injured in the accident and anybody who was touched by yesterday's terrible tragedy."
The Queen, Prime Minister Boris Johnson and Scottish First Minister Nicola Sturgeon have paid tribute to those killed in the "tragic" incident.
The train that derailed was made up of two locomotives - at the front and back - and four carriages.
A review of CCTV at stations where the service stopped suggested there were nine people on the train, including crew.
Ch Supt Eddie Wylie, of British Transport Police, said he believed all passengers had been accounted for.
He added: "Once the area has been made safe then a full and thorough search will be conducted, which is likely to take some time.
"I know many people will understandably have questions and we will be working closely alongside the Rail Accident Investigation Branch and the Office of Rail and Road to establish the full circumstances of how the train came to derail."