Prosecutors fabricated evidence in the corruption trial of former deputy prime minister Anwar Ibrahim, his lawyers charged as they made a final bid to clear his name in Malaysia's highest court Wednesday.

The accusation sparked a walkout by Attorney General Abdul Gani Patail, who led the 1999 prosecution of Anwar and is appearing for the government in a Federal Court review of the case.

Anwar's lawyers want his conviction for corruption thrown out, which would allow him to return immediately to politics after being freed last week after nearly six years in jail when the same court overturned his sodomy conviction.

The Federal Court, which agreed unanimously Tuesday to review its own 2002 decision to reject his

appeal in the corruption case, on Wednesday set September 15 to deliver its verdict after hearing arguments from both sides.

"We will reserve our decision to September 15," said Justice Malek Ahmad, who heads a three-man bench.

Anwar's lawyers were hopeful of a positive outcome but said the court could also call for a new appeal hearing to allow fresh evidence to be cited, or send the case to be heard by a new panel of judges.

Earlier, they told the court their client was denied a fair hearing and attacked Gani's credibility.

"In this case there was compelling evidence that the two prosecutors, one of whom is unfortunately Abdul Gani Patail, were caught red handed in attempting to fabricate evidence against Anwar," said lawyer Christopher Fernando.