Belarussian authorities have shut down the local office of the Organization for Security and Co-operation in Europe, which was monitoring the Presidential election.
A Foreign Ministry spokesman said, without referring to the election, that there were "no objective reasons for retaining" the OSCE's mission.
The OSCE had said that many counts in the balloting had been "very bad". The European Union had warned Belarus that billions in economic aid rested on a positive report by the OSCE on the vote.
Meanwhile, the heads of the Polish and German Parlaiment's Foreign Affairs Committees have issued a joint declaration that the presidential elections in Belarus showed a “complete lack of respect for European values and standards".
The declaration appeals to other foreign ministers in the European Union to hold a meeting of the European Council to decide on a response.
The head of the Polish Foreign Affairs Committee, Andrzej Halicki, said a meeting is planned with the head of the International Affairs Committee in the Russian Duma, Konstantin Kosachev.