Zimbabwe’s Movement for Democratic Change (MDC) has filed a legal challenge to Robert Mugabe’s victory in last week’s presidential elections.
The electoral petition seeks an order for the result to be declared null and void and a new election to be called within 60 days.
The MDC’s 15 grounds include alleged bribery, abuse of “assisted voting” and manipulation of the electoral roll.
Mr Mugabe, 89, won with 61% of the presidential vote.
His Zanu-PF party gained a two-thirds majority in parliament, with 160 seats compared to 49 for the opposition MDC party.
The MDC is to file a complaint on the parliamentary results at a later date.