By Mark Trevelyan (Reuters) -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.

Belarus on Sunday held an orchestrated election virtually guaranteed to give its 70-year-old autocrat, Alexander Lukashenko, yet another presidential term on top of his three decades in power.