In a statement issued by the Scottish Catholic Church, Cardinal Keith O'Brien said:
I have valued the opportunity of serving the people of Scotland and overseas in various ways since becoming a priest.
Looking back over my years of ministry: For any good I have been able to do, I thank God. For any failures, I apologise to all whom I have offended.
More top news
New test could help doctors identify the signs of lung cancer up to five years before the disease shows up on traditional scans.
The Police Federation is pushing for a wider rollout of Tasers , and a new model, the X2, is awaiting Home Office approval.
Charity says social media is helping fuel a nation of 'deeply unhappy' children as figures show rise in number hospitalised over self-harm.