sentences:  The same day, Woźniak was temporarily arrested, but then bailed by the local worker's union.First skirmishes started at 8 p.m. An angry crowd, chanting "blood for blood", and comparing the police's actions to those of Gestapo and Milicja Obywatelska, erected barricades in the center of the city and started to hurl rocks at police.The night of January 11–12 was very violent.