The Vesna group said today that 10 other protesters were given sentences of three to five days.
All were detained today amid a demonstration of more than 1,000 people in the city of Maladzyechna.
The gathering protested against Belarus' law that fines unemployed people USD 250 if they do not register with state labor exchanges, and called for the resignation of President Alexander Lukashenko, the authoritarian leader in power since 1994.
The unemployment fine has been the focus of an unusual wave of protests in the tightly policed country over the last month. About 400 protesters gathered in the city of Pinsk today.
Disclaimer: No Business Standard Journalist was involved in creation of this content