Mali’s President Ibrahim Boubacar Keita has won Sunday’s heavily disputed run-off election with 67.17% of the vote, official results show.

Opposition candidate Soumaila Cisse, who won 32.83% of the vote, said on Monday that he would reject the result as he believed the vote was marred by fraud.

“I call on all Malians to rise up… We will not accept the dictatorship of fraud,” he said.

The victory hands Keita a second term in the mostly desert West African country where militant violence and claims of fraud by the opposition marred the poll.