Mukhtar Ablyazov, a fugitive former Kazakh banker and political activist, has won his appeal against a decision by a French court to extradite him to Russia. France's Court of Cassation on Wednesday upheld Mr Ablyazov's appeal against the ruling reached by a court in Aix-en-Provence in January and ordered the case to be heard again, assigning it to a court in Lyon. A defence lawyer said it was a "significant victory" for Mr Ablyazov.Mr Ablyazov, former chairman and major shareholder of Kazakhstan's BTA Bank, was arrested in France last July after spending more than a year in hiding while being pursued by the bank and the government of Kazakhstan for fraud allegedly amounting to more than $6bn. Authorities in Russia anlyond Ukraine both sought to extradite Mr Ablyazov from France to face charges of fraud related to BTA Bank, which was nationalised by Kazakhstan in 2009.