Infiltrated by NKGB and NKVD agents – the Ministry of Public Security was well known for its criminal nature. From January 1945 (or, July 22), the surviving members of the Home Army laid down their arms, granted an official amnesty (lasting till October 15). Most were arrested by UB on the spot, tortured and tried for treason. The UB carried out brutal pacification of civilians, mass arrests (see: Augustów roundup), as well as makeshift executions (see: Mokotów Prison murder, Public execution in Dębica) and secret assassinations. According to depositions by Józef Światło and other communist sources, in 1945 alone the number of members of the Polish Underground State deported to Siberia and various labor camps in the Soviet Union reached 50,000.