Foreign secretary William Hague has said that the death of Osama Bin Laden is a "very serious blow" to Al-Qaeda.

Speaking to Today presenter Justin Webb, he said it was a "positive development" and an "unequivocally good thing".

But he warned that it "was not the end of being vigilant against Al-Qaeda".

"There may be parts of Al-Q that will try to show that they are still in business in the coming weeks."

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