David Cameron has hailed the anti-corruption summit he is hosting in London as "the biggest demonstration of the political will to address corruption that we have seen for many, many years".
The summit has brought together more than 40 countries including 12 heads of state and government.
Speaking at the end of the first day, he said attendees had shown "far more political will not just for words, but for action that will make a difference".
The Nigerian President has issued a statement through his spokesman saying David Cameron's remarks about Nigeria are "embarrassing", and that he must be looking at an "old snapshot of Nigeria."
David Cameron has caused controversy after he was filmed telling the Queen that Nigeria and Afghanistan are "fantastically corrupt," ahead of an anti-corruption summit.
David Cameron hoped to sign up a global declaration against corruption - but only six countries put pen to paper.
Why is it happening? Who is going? And will it get awkward after the Prime Minister's 'corruption gaffe'?
David Cameron has praised Nigeria and Afghanistan for the action they have taken in combating corruption.