Incumbent Belarusian President Alexander Lukashenko has won the Sunday presidential election with 79.67 percent, according to BBC citing the Central Election Commission (CEC).
On the other hand, several thousands of Belarusians have gathered around the October Square in downtown Minsk, the capital city of Belarus, protesting against the rigged election.
Opposition candidates have pledged to stage a joint "peace rally" on Sunday night after the voting was over, urging their supporters to demand a new election.
However, Belarusian authorities said any rally with no permission before-hand was illegal.
Four candidates for President - Andrey Sannikov, Nikolay Statkevich, Grigory Kostusev and Vitaly Rimashevski, have been detained.
Criminal cases will be filed against organizers of disorders in Minsk, Belarusian Ministry of Internal Affairs reports.