Former warlord Jean-Pierre Bemba's candidacy in the Democratic Republic of Congo's upcoming presidential elections was deemed "inadmissible" by the country's election commission on Friday, as opposition groups cried foul.

Former Congolese warlord Jean-Pierre Bemba filed his candidacy for president on Thursday ahead of December elections in the Democratic Republic of Congo, where Bemba returned this week after a decade in prison at the Hague.

Judges at the International Criminal Court (ICC) have ordered the release of former Democratic Republic of Congo rebel leader and Vice-President Jean-Pierre Bemba.

International Criminal Court appeals judges have overturned the convictions of former Congolese Vice President Jean-Pierre Bemba for atrocities committed by his forces in Central African Republic.

Former Congolese Vice-President Jean-Pierre Bemba has been found guilty by the International Criminal Court (ICC) of bribing witnesses.