A Zimbabwean court has convicted prominent opposition politician Tendai Biti for announcing that his party's leader won disputed elections held in July.

Biti was on trial for "unofficial and false declaration of results." Magistrate Gloria Takundwa fined him $200 for the offence.

Biti, also a leading human rights lawyer, fled the country to neighboring Zambia in August citing threats to his life. He was deported back to Zimbabwe days later and arrested for allegedly violating the electoral law.

Main opposition leader Nelson Chamisa and his party, the Movement for Democratic Change, have rejected the election results, claiming the electoral agency rigged the vote to ensure a win for President Emmerson Mnangagwa.