RIO DE JANEIRO, June 25 (Xinhua) -- The Brazilian Supreme Court postponed on Monday the voting for the habeas corpus request of Brazil's former president Luiz Inacio Lula da Silva.

Justices of the Brazil Supreme Federal Court attend a session in Brasilia, Brazil, on Wednesday, April 4, 2018. Brazil's Supreme Court is to rule on former President Luiz Inacio Lula da Silva's plea to remain at liberty despite a lengthy prison sentence, a decision likely to shape the outcome of October's elections and mark the culmination of an epic corruption scandal. (Photo: VCG)

Supreme Court Judge Carmen Lucia took off the review for the habeas corpus from the schedule for Tuesday, and a new date has not been set.

The request is based on a complaint that Sergio Moro, the judge who convicted Lula, was under suspicion and acted with bias against the ex-president.

A series of messages exchanged between Moro and the lead prosecutor Deltan Dallagnol in Lula's case was released recently, which indicates Moro's collusion with the prosecution in the case and his lack of impartiality.

Lula's lawyers called for priority in the case based on Lula's age and the fact that he is in jail for 443 days already. The ex-president was convicted for corruption and the sentence was confirmed by the court of appeals, but Lula still has the right to appeal to superior courts.

Lula started serving his sentence after the appeals court's decision, due to a recent understanding of Brazilian courts that a defendant's sentence can be started before all appeals are judged.

Last year, Lula's defense presented the habeas corpus request. The procedure for the request has already started, with two judges having presented their vote not to release Lula. Three judges still need to vote.