Media mogul Conrad Black has lost his bid to be freed on bond and will have to report to a Florida prison on Monday.

A U.S. federal appeals court in Chicago on Thursday ruled that Black must go to jail while his appeal of his fraud and obstruction of justice convictions moves through the court system.

The Montreal-born Black was convicted July 13 of obstructing justice and defrauding shareholders of his former newspaper company, Hollinger International Inc. He was sentenced to 6½ years in prison and ordered to start serving his time on March 3.

The U.S. 7th Circuit Court of Appeals on Thursday did, however, agree to free Black's two co-defendants on bond while they appeal their own fraud sentences.

Former Hollinger executive John Boultbee was sentenced to 27 months in jail while his colleague Peter Atkinson received a 24-month jail sentence.

In explaining the decision not to free Black, the three appeal court judges who ruled on Black's case noted that he was convicted of one offence that the other Hollinger executives were not — the obstruction of justice.