Malcolm Jones was diagnosed with heart problems
Runrig guitarist Malcolm Jones is to undergo heart bypass surgery next week.
Inverness-born Jones, 49, who collapsed at Waverley railway station in Edinburgh in March, was diagnosed with heart problems.
Runrig said the timing of the operation meant three Danish concerts scheduled for the end of June have had to be cancelled.
A spokesman said: "We apologise for any disappointment caused by the cancellation of the Danish concerts."
He added: "Malcolm's health must be our main priority.
"His doctors assure us that he will make a full and speedy recovery and will be back with us for our concerts in August."