Many Western leaders are decrying Belarusian President Alexander Lukashenko's re-election victory Sunday, calling it a sham along with the country's opposition.

Belarusian leader and Russian ally Alexander Lukashenko extended his 31-year rule on Monday after electoral officials declared him the winner of a presidential election Western governments rejected as a sham.

Alexander Lukashenko, who has ruled the ex-Soviet state for 31 years, held a four-hour press conference musing that some of his opponents "chose prison", after winning 88 per cent of the vote.