Alexander Milenkevich, Sergei Kalyakin, Vintsuk Vyachorka and Alexander Bukhvostov were given a 15-day 'administrative arrest' sentences after they organized an unsanctioned rally on April 26 dedicating it to 20th anniversary of the Chernobyl tragedy.
Communist party leader Kalyakin and Labor Party leader Bukhvostov were the first to leave the prison, with Vyachorka, the leader of Belarus People's Front, expected to be released later in the evening. Milenkevich, the main opposition candidate in Belarus' presidential elections held in March, will be released tomorrow.
Belarus' opposition holds rallies each year dedicating them to anniversaries of the Chernobyl tragedy, the world's worst nuclear accident, which affected much of the country.