In his memoirs, Pavel Sudoplatov brought up the details of how Kuznetsov recruited German officer Oster. According to Sudoplatov, the training of German saboteurs was taking place in the foothills of the Carpathian Mountains, where the group led by the intelligence officer Kuznetsov, who was disguised as a Wehrmacht lieutenant, was working. Oster, who owed Kunetsov some money, offered to pay back the debt with Persian carpets after his trip to Tehran, which suggested that the plot about the assassination attempt during the Tehran conference was quite feasible.[13]