Rosa Luxemburg said this quote

During the night two delegates of the railwaymen were arrested. The strikers immediately demanded their release, and as this was not conceded, they decided not to allow trains leave the town. At the station all the strikers with their wives and families sat down on the railway track-a sea of human beings. They were threatened with rifles salvoes. The workers bared their breast and cried, Shoot! A salvo was fired into the defenceless seated crowd, and 30 to 40 corpses, among them women and children, remained on the ground. On this becoming known the whole town of Kiev went to strike on the same day. The corpses of the murdered workers were raised on high by the crowd and carried round in mass demonstration.