"At the moment, our observers have not recorded any instances of electoral rules violations or voter suppression," Lebedev told journalists.
Russian lawmaker Oleg Melnichenko, the coordinator of the IPA CIS group of international observers, said the election had been set up in accordance with the international standards.
A similar position was expressed by Igor Borisov, a member of Russia's Council for Civil Society and Human Rights.
"At the moment, we have not received information about any serious violations that would make us say that the elections must not be recognized as an expression of the will of the people. However, we are noticing a certain nervousness in the way the election is organized," Borisov said.
Earlier in the day, the Belarusian central election committee announced that the turnout had exceeded 54 percent, making the results of the election valid.
