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
A freight train carrying hazardous material has derailed near a busy metro station, spilling chemicals onto the tracks.
A man (87) and woman (78) were trapped off the A46 in Gloucestershire overnight - the car was eventually spotted by a passing driver.
Labour leader tells May Day rally his party 'stand absolutely against racism in any form'.