In Cameroon an opposition candidate has declared himself the winner of Sunday's presidential election despite a government warning not to announce any unofficial results.

At a press conference in the capital Yaoundé, Maurice Kamto said he had received a clear mandate from the people and he vowed to defend it.

Mr Kamto provided no evidence to back up what correspondents say is both a controversial and provocative declaration.

No official results have yet been declared and the Constitutional Court has two weeks to announce the outcome.

Ahead of Sunday's vote, President Paul Biya was widely seen as the favourite to win - he is seeking a seventh term in office.