People carry a giant historical flag of Belarus during a celebration 103rd anniversary of the declaration of the Belarusian People's Respublic, in Vilnius, Lithuania, Thursday, March 25, 2021.
Freedom Day is an unofficial holiday in Belarus celebrated on 25 March to commemorate the declaration of independence by the Belarusian Democratic Republic on that date in 1918.
The Thursday protest marked the anniversary of the 1918 declaration of the Belarus People's Republic, an independent state that lasted only a few months before the Red Army moved in.
The opposition traditionally observes the anniversary as the country's unofficial Freedom Day.
The arrests came a day after their leader, Andżelika Borys, was sentenced to 15 days in jail for holding unauthorized mass events.