A key witness in the murder of Rwanda's former president says he will no longer co-operate with the inquiry.
Captain Ruzibiza says he is a pawn in a diplomatic struggle
Captain Josue Abdul Ruzibiza says he believes there are political motives involved in the French prosecution.
The 1994 killing of President Juvenal Habyarimana triggered the genocide in which around 800,000 people died.
Mr Ruzibiza lives in exile in Norway from where he has publicly accused President Paul Kagame of ordering his predecessor's murder.
President Kagame is currently in Britain and has dismissed accusations of his involvement in the killing of his predecessor.
Although Mr Ruzibiza says he is suspending co-operation with the French investigation, he has not changed his story.
Some 800,000 people were killed in the 1994 genocide
A former captain in the rebel movement, the Rwandan Patriotic Front (RPF), Mr Ruzibiza says he stands by his allegation that President Kagame ordered the attack on the plane in a bid to seize power in Rwanda.
In a letter to the media, Mr Ruzibiza says: "My intention is that justice should be done, not that there should be political settling of scores between France and Rwanda, in which I have become a victim."
He goes on to say that a number of elements published by Judge Bruguiere in his indictment suggest a motive other than legal.
"I do not want to be used as a pawn," he says.
Mr Ruzibiza is widely quoted in the indictment produced by the French anti-terrorism judge, Jean-Louis Bruguiere.
But, he says he is now caught in the middle of a political battle between France and Rwanda.
Diplomatic relations between the two countries have broken down and Rwanda has expelled French organisations working in the country.
President Kagame, on a visit to Britain, has denied any involvement in Mr Habyarimana's death and has accused France of actively supporting the killings.
"It is France that supported the genocidal forces, that trained them, that armed them, that participating in fighting against the forces that were trying to stop the genocide," he told the BBC.
France denies involvement in the genocide and says its military interventions helped Rwandans.
Several days ago, another witness announced that he would no longer cooperate with the judge and claimed that he had never accused President Kagame of involvement in the air crash.