A group of protesters blocked the entrance to the Energy Ministry on Saturday , a move Energy Minister Eduard Stavytsky called a direct threat to the entire energy system . NEW : Protesters launch fireworks into government buildings in Kiev early Sunday morning . Police : Opposition says police were in the building to launch attacks on them . On Saturday the opposition leaders rejected Ukrainian president 's peace offer . President Viktor ##iya had offered government posts to opposition leaders , according to a government spokesman .
NEW : Protesters launch fireworks into government buildings in Kiev early Sunday morning . Police : Opposition says police were in the building to launch attacks on them . On Saturday the opposition leaders rejected Ukrainian president 's peace offer . President Viktor ##iya had offered government posts to opposition leaders , according to a government spokesman .