Ukrainian nationalists targeted Jews in the first pogrom on the pretext of them being purportedly responsible for the NKVD prisoner massacre in Lviv, which left behind thousands of corpses in three Lviv prisons. The subsequent massacres were directed by the Germans in the context of the Holocaust in Eastern Europe. The pogroms were ignored or obfuscated in Ukrainian historical memory, starting with OUN's actions to purge or whitewash its own record of anti-Jewish violence.