Up to 100 people gathered in Minsk's Independence Square on December 19, where thousands protested against the reelection of President Alyaksandr Lukashenka a year before, to leave photos of political prisoners and light candles. About 30 were arrested.
Police in Minsk said 32 people faced court hearings on charges such as taking part in illegal protests and hooliganism.
Some 700 people, including six presidential candidates, were detained when tens of thousands of people rallied in December 2010 to protest Lukashenka's reelection in a fraud-tainted vote.
Separately, the women's rights group Femen from Ukraine says three of its activists who staged a topless protest in Minsk were detained by the Belarusian KGB, taken to a forest, and abused and threatened.
On December 18, the United States and the European Union jointly called on Belarus to release all political prisoners and voiced concern over deteriorating rights conditions in the year since the December 2010 crackdown.