Scotland's First Minister Alex Salmond has told ITV News the Jim Clark Rally crash that left three people dead and two others critically injured was "an extraordinary incident of great severity".
Mr Salmond said: "These are tragic circumstances and obviously all our hearts go out to the people who have been killed and injured.
"Given the extent of this tragedy, people can be reassured the [investigation] process will be complete and thorough".
More top news
A survey showing the number of 14-17 years olds who have tried the products has raised questions about their appeal to young people.
Top UK Advertising boss calls politicians to stop meddling in business and concentrate on creating wealth rather than spending cash
A touching note from a passenger thanking a pilot for getting her home safely in the wake of the Germanwings tragedy has gone viral.