Zimbabwe's opposition leader has dismissed “unverified fake results” after President Emmerson Mnangagwa was declared winner of the first election since the ousting of Robert Mugabe.
Nelson Chamisa's MDC Alliance party vowed to launch a legal challenge, saying the vote was rigged.
Mr Mnangagwa has urged Zimbabweans to unite behind his presidency.
Troops are patrolling the streets of the capital Harare after protests on Wednesday left six people dead.
A BBC correspondent in the city centre says a police vehicle with a loudspeaker is broadcasting the message: “Zimbabwe is open for business. We are here to protect you, feel free to walk and open your business, all is well, fear not.”
Mr Mnangagwa took office when President Mugabe, 94, was forced to resign in November. The vote was intended to set Zimbabwe on a new path following years of repressive rule, but tensions are now rising.
Mr Mnangagwa, of the governing Zanu-PF party, narrowly avoided a run-off by taking 50.8% of the vote, official results show. Mr Chamisa took 44.3%.
The country's…
