Союз освобождения
On 4 July 1930 Sierada was arrested by the NKVD as part of the so-called Case of the Union of Liberation of Belarus. In April 1931 he was sentenced to 5 years of exile in Yaroslavl, Russia. After this, he was again sentenced in 1941 to 10 more years in the gulag. He was set free, on 19 November 1943, from the gulag camp chain (Krasnoyarsk Krai) and his further fate is unknown.