HARARE, Aug. 3 (Xinhua) -- Zimbabwean opposition MDC Alliance leader Nelson Chamisa said Friday his party has enough evidence to challenge the results of Monday's polls won by incumbent president Emmerson Mnangagwa and his ruling ZANU-PF party.
Addressing a media briefing at a local hotel, Chamisa said his party does not accept the "fraudulent results" which were not verified by his party as required by law.
"This election in terms of the presidential result is fraudulent, illegal, illegitimate and characterized by serious credibility gaps and some serious legitimacy issues that we feel must be raised," Chamisa said.
"We need a proper election result. We have so much evidence to show how the election was rigged," he said.
Chamisa's address came after anti-riot police had initially stormed the venue and dispersed journalists.
Chamisa claimed their tally of votes casts showed that his party won the presidential poll by 56 percent while Mnangagwa got 44 percent.
Mnangagwa was Friday morning declared the winner of the presidential election after garnering 50.8 percent of the vote against Chamisa's 44.3 percent.
The ruling ZANU-PF party also obtained a two-thirds majority in the bicameral parliament.
However, Chamisa said the vote was also manipulated to deny his party a parliamentary majority.
Mnangagwa immediately dismissed Chamisa's vote rigging claims and maintained his party won the fiercely contested polls fairly.
"This is an indispensable part of the new Zimbabwe. It is non-negotiable and will not change. We won the election freely and fairly, and have nothing to hide or fear. Anyone is free to address the media at any time," he said on Twitter.
He also criticized police's attempts to disrupt Chamisa's press conference.
"The scenes today at the Bronte Hotel have no place in our society and we are urgently investigating the matter to understand exactly what happened. Over the past nine months we have protected freedom of speech, of assembly and the right to criticize the government," he said on Twitter.