In the early spring of 1981 in Poland, during the Bydgoszcz events, several members of the Solidarity movement, including Jan Rulewski, Mariusz Łabentowicz and Roman Bartoszcze, were brutally beaten by the security services, such as Milicja Obywatelska and ZOMO. The Bydgoszcz events soon became widely known across Poland, and on 24 March 1981 Solidarity decided to go on a nationwide strike in protest against the violence. The strike was planned for Tuesday, 31 March 1981. On 25 March, Lech Wałęsa met Deputy Prime Minister Mieczysław Rakowski of the Polish United Workers' Party, but their talks were fruitless. Two days later, a four-hour national warning strike took place. It was the biggest strike in the history of not only Poland but of the Warsaw Pact itself. According to several sources, between 12 million and 14 million Poles took part.