Wiązownica massacre - attack on the village Wiązownica, located in Jarosław County Subcarpathian Voivodeship, in south-eastern Poland (1945 in province of Lviv) related to Massacres of Poles in Volhynia and Eastern Galicia. On April 17, 1945 in the village the Ukrainian Insurgent Army (UPA) murdered about 100 Poles.