Barry Bonds' perjury trial could be postponed for months after Federal prosecutors said they would appeal a judge's ruling that alleged positive steroid tests and other evidence are inadmissible.

Prosecutors notified Bonds' lawyers that they would ask the Ninth Circuit Court of Appeals to reinstate the evidence that had been banned by US District Judge Susan Illston last week. The trial was scheduled to begin on Monday, but the court sent out a notice to all parties on Friday afternoon informing them of the government's appeal and said that jury selection "will not proceed until further notice".