During the operation, U-209 (Lt. Captain Brodda) sank, on 17 August, a transport convoy of the Soviet Secret Service (NKVD) composed of cargo ships Nord and Komsomolets and light vessels Sh-III and P-IV west of the Yugorsky Strait. Apparently there were 328 political prisoners on board, of which 305 men were killed through artillery fire or drowning. Meanwhile, on 20 August, U-456 (Lt. Captain Max-Martin Teichert) tried to sink the Soviet icebreaker Fyodor Litke off Belushya Guba with torpedoes but was unsuccessful.