Pope Francis has said 2 per cent of the Roman Catholic clergy worldwide, the equivalent of 8000 members, are paedophiles.
The figure was revealed as the Archbishop of Canterbury separately admitted he expects more sex scandals to emerge from within the Anglican Church.
The Pope described child sex abusers as a "leprosy" within the Catholic Church and said the offenders include "priests and even bishops and cardinals".
In an interview with La Repubblica newspaper in Italy, the Pontiff cited his aides as saying that "the level of paedophilia in the Church is at 2 per cent". As the Catholic clergy numbers 414,000, it would mean more than 8000 priests fall into this category. Estimates of the prevalence of paedophilia in the wider population range from a fraction of 1 per cent to 4 per cent.
In an interview on the BBC's Andrew Marr Show yesterday, the Archbishop of Canterbury, the Most Rev Justin Welby, said it was becoming clearer that paedophilia had not been properly addressed within Anglicanism and disclosed that he deals with the issue daily.