Zimbabwe's opposition leader Nelson Chamisa on Sunday claimed victory in the country's election after challenging results that saw President Emmerson Mnangagwa winning a second term in office.

"We have won this election. We are the leaders. We are even surprised why Mnangagwa has been declared a leader," said the 45-year-old lawyer and pastor, who heads the Citizens Coalition for Change (CCC) at a press conference in Harare.