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
Anthony Scaramucci told ITV News that a trade agreement with Britain was a priority for the incoming president.
Police say that unless one outstanding line of enquiry provides a breakthrough, the investigation will be scaled down next month.
Kristi Loyall had her foot amputated after she was diagnosed with cancer, but since then her Instagram account has been an inspiration.