Jerzy Popiełuszko (Polish pronunciation: [ˈjɛʐɨ popʲɛˈwuʂkɔ] born Alfons Popiełuszko; 14 September 1947–19 October 1984) was a Polish Roman Catholic priest who became associated with the opposition Solidarity trade union in communist Poland. He was murdered in 1984 by three agents of Służba Bezpieczeństwa (Security Service of the Ministry of Internal Affairs), who were shortly thereafter tried and convicted of the murder.