Zimbabwe's re-elected President, Emmerson Mnangagwa, has been accused of "gigantic fraud" by an opposition leader and said anyone questioning the results of last week's election should take their case to court.

Mnangagwa won 52.6% of the vote, whilst the leader of the opposition Citizens' Coalition for Change (CCC), Nelson Chamisa, gained 44%, according to the election commission on Saturday.

However, on Sunday, Chamisa said the CCC would not accept the election results and the opposition would form the new government. "We will not wait for five years. There has to be a change now," he stated.

According to two observers' groups, police raided their centres and arrested staff, so they were unable to independently verify the results. A statement by the Election Resource Centre and the Zimbabwe Election Support Network said this "cast a shadow over the entire election process."

The election process was also criticised by regional body SADC and the African Union, Reuters reports.

Analysts said the election was heavily biased in the ruling ZANU-PF party's favour, which has been in power for over 40 years. ZANU-PF denies election rigging or having an unfair advantage.

Chamisa said on X (formerly Twitter) that the election is "a blatant and gigantic fraud," and he is relying on diplomatic pressure on the government. "Do not leave us, particularly our fellow brothers and sisters, in the region and on the continent. We count on your solidarity as we seek to resolve this political crisis."

The result was welcomed by Mnangagwa: "I competed with them, and I am happy that I have won the race," he said on Sunday at State House.

"Those who feel the race was not run properly should know where to go to."