 Complete the following phrase:  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: 