Travellers are facing a second day of disruption after a freight train derailed at Aberdeen.
A section of the Freightliner train came off the line at Aberdeen at around 4.50pm on Wednesday.
The derailment has caused major disruption to cross-country rail services which is expected to last until Friday morning.
Heavy lifting cranes are being brought north from Wigan to clear the train off the line. By 4pm the crane had not yet arrived.
A Network Rail spokeswoman said that teams would work through the night in an effort to have the line cleared by Friday morning.
The Rail Accident Investigation Branch has launched an inquiry into how the accident happened.
A Transport Scotland spokesman said: "The Rail Accident Investigation Branch has been advised and will be initiating an investigation into the circumstances of this incident.
"At present there are no reports of injuries and, as the wagons were empty, no threat of environmental impact is expected as a result of this derailment.
"It is however likely to result in disruption for rail travellers coming to and from Aberdeen whilst the freight train wagons are removed from the line.
"Ministers have been made aware of the incident and are monitoring the situation to ensure disruption to the travelling public is minimised where possible."
Scotrail says rail services are expected to be disrupted all day Thursday, and should return to normal on Friday morning.
Replacement buses are operating between Aberdeen and Stonehaven in the meantime, extending journey times by around an hour.
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