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US preacher Harold E. Camping admits that he made an error when he predicted that the world would end on 21 May 2011, and has revealed a revised date for the 'Rapture'.

According to the Telegraph, Camping now says the world will end on 21 October 2011. This was his original prediction for the date the globe would be consumed by a giant fireball.

The Christian radio host had said that 200 million Christians would be taken up to heaven last Saturday, before the world was destroyed.

He said that 21 May was "a very difficult" time for him.

"I can tell you when 21 May came and went it was a very difficult time for me - a very difficult time. I was truly wondering what is going on. In my mind, I went back through all the promises God had made," he said, according to the Guardian.

"What in the world was happening. I really was praying and praying: 'Lord, what happened?'"

The Family Radio president also offered a half-hearted apology.

"If people want me to apologise then I can apologise, yes. I did not have all of that worked out as I wished I had it. But it doesn't bother me at all because I'm not a genius.

"When I make an error, I say, 'Yes, I was wrong.' I said that already."