David Cameron's comments about corruption in Afghanistan are "unfair", a spokesman for the Afghan embassy has said.
The spokesman said: "President Ghani and his Government since in office have taken major steps to fight corruption.
"Countering corruption is a top priority along security issues for the National Unity Government.
"We have made important progresses in fighting systematic capture in major national procurement contracts and are making progress on addressing institutional issues as well as issues related to impunity.
"Therefore calling Afghanistan in that way and taking bold decisions by NUG is unfair."
Britain must get its house in order as well as helping to tackle corruption abroad, a group tackling global financial corruption has told ITV News.
Responding to David Cameron's comments about Nigeria and Afghanistan, Robert Palmer of Global Witness said: “Nigeria and Afghanistan are both deeply corrupt countries, but their leaders have shown signs that they want to clean up their act.
"They are not helped by the secrecy sold by UK tax havens or the army of lawyers and bankers from places like London willing to handle stolen money or look the other way - we must get our own house in order too."
David Cameron's comments on corruption in Nigeria and Afghanistan are "very unhelpful and deeply regrettable", Nigerian poet and novelist Ben Okri has told ITV News.
Mr Okri said he was "appalled and rather surprised" that the prime minister would make the remark, saying it sent out the wrong signal and would damage relations between the nations.
Mr Okri, considered one of the foremost African authors, described the comments as "fantastically" unhelpful.
He said: "I'm rather appalled actually and rather surprised that a leader of an important world nation should be making that kind of remark to world. I think it sends a very wrong signal out to the world, I think it's a very discouraging remark."
He added that he thought Mr Cameron should apologise, saying: "I think he should make sensible amends."
David Cameron "has egg on his face" after being filmed telling the Queen there are some "fantastically corrupt" countries coming to a UK anti-corruption summit, Labour said.
The party likened the episode to another gaffe - when Mr Cameron was caught revealing how the Queen "purred" with pleasure when he told her Scots had rejected independence.
"This is another gaffe from the PM - you'd hope he'd have learned his lesson when it comes to off the record comments and the Queen but sadly not," Wes Streeting MP said.
"The fact that David Cameron has egg on his face shouldn't deflect from the more serious issue: for all his talk about corruption he's failing to act.
"If the PM really is serious about tackling corruption at the summit this week he needs to get his own house in order and make good on his promise to deliver public registers of beneficial ownership for the UK crown dependencies and overseas territories."
David Cameron's comments on corruption in Nigeria and Afghanistan are not "entirely helpful" ahead of Thursday's anti-corruption summit, Transparency International has said.
A spokesman for the group, which works to battle corruption worldwide, said: "I don't think you could call it unfair on Nigeria and Afghanistan."
They added that the two nations "do want change".
Transparency International on Cameron's comments: "I don't think you can call it unfair on Nigeria & Afghanistan"
Transparency International:"not sure it's entirely helpful if you've invited people to your summit...but these countries do want to change."
A table measuring corruption levels of countries around the world scores Afghanistan and Nigeria poorly, but they are not at the bottom of the list.
David Cameron has been overheard telling the Queen that Nigeria and Afghanistan are "possibly two of the most corrupt countries in the world".
A 2015 table compiled by Transparency International, which works to stop corruption, rates Afghanistan 166th out of 168 countries, with a score of 11 out of 100. Nigeria is ranked 136th, with a score of 26.
The UK is joint 10th in the table with a score of 81 - the same as Germany and Luxembourg. Denmark tops the table with a score of 91.
Somalia and North Korea are bottom of the list.
The PM has been overheard telling the Queen that Nigeria and Afghanistan are "possibly two of the most corrupt countries in the world".Read the full story ›
Fifteen of the 219 Chibok schoolgirls, missing since being abducted by Boko Haram two years ago, have appeared in a new video released by their kidnappers as 'proof of life'.
Lined up for the camera the girls confirm their names in the footage which is believed to have been recorded on Christmas day last year and is being used as part of negotiations between Boko Haram and the Nigerian government.
- Video report by ITV News' International Affairs Editor Rageh Omaar.
A look at the key moments in the timeline of events surrounding the abduction of 219 still missing Nigerian schoolgirls by Boko Haram.Read the full story ›
The Nigerian government has "not done enough" to find the 219 schoolgirls who were kidnapped by Islamist group Boko Haram more than two years ago, according to Amnesty International.
Speaking in the wake of the release of a new video appearing to show 15 of the still missing girls the rights group said authorities needed to "step up" its actions to try and locate the kidnapped students.
A spokeswoman for Amnesty International told ITV News: "The Nigerian government now needs to really step up its attention in terms of identifying and tracking where these girls have been, where they have been over the past two years and where they are right now."