This is stated on the website of the Ministry of Foreign Affairs of Belarus.
“The Russian ambassador has been asked for detailed explanations regarding the goals and other aspects of the arrival and stay in our country of this organized group of persons, many of whose members have proven experience of participation in armed conflicts,” the statement says.
Earlier, the state Belarusian agency BelTA announced the detention of 33 Russians in Belarus. Russian Ambassador to Belarus Dmitry Mezentsev commented on this information.