At 05.57 hours on 9 Jan 1943, U-124 fired two torpedoes in a second attack on convoy TB-1 about 100 miles northeast of Paramaribo and two minutes later another torpedo. Mohr thought that he had hit three ships, but in fact the first torpedo passed astern of the Collingsworth, the second hit the ship and the third missed also, but hit the Minotaur.

The torpedo was seen about 200 yards from the Minotaur (Master Jens Jensen) and the helmsman put the wheel hard to port, but it was too late and it struck on the port side in the #1 hold. The explosion opened a large hole and flooded the hold rapidly. The engines were secured and the eight officers, 28 crewmen, 15 armed guards (the ship was armed with two 3in and two .50cal guns) and one passenger (naval medical officer) began abandon ship in two lifeboats, but the ship sank by the bow within four minutes, fouling one boat and capsizing the other. The men were thrown in the water and had to swim to three rafts that floated free. Two officers and four crewmen drowned. The survivors were picked up by USS PC-577 later that day and landed at Paramaribo, Surinam.