One man has been airlifted to Aberdeen Royal Infirmary and mountain rescue teams are continuing their search for two other people, police said.
More top news
Madonna says she still cannot bring herself to watch footage of the moment she fell on stage while performing at the Brit Awards.
Ed Miliband has pledged to give zero-hours workers the right to convert their contract into a regular job after three months.
More than 100 leaders have declared their support for a Conservative-led government, warning a Labour would "put the recovery at risk".