On December 16, three days after the introduction of the martial law in Poland, pro-Solidarity miners striking against the declaration of the martial law by General Wojciech Jaruzelski were dispersed by the troops of the Polish army and police.
In the apex of the events, a commando-type special platoon of ZOMO opened the "shoot to kill" fire at the strikers, killing nine of them (Jan Stawisiński, Joachim Gnida, Józef Czekalski, Krzysztof Giza, Ryszard Gzik, Bogusław Kopczak, Andrzej Pełka, Zbigniew Wilk and Zenon Zając) and wounding 21 others.