At 14.52 hours on 28 May 1941 the unescorted Papalemos was hit on the port side in the stern by one torpedo from U-107. The explosion destroyed large parts of the superstructure and a lifeboat. After the crew had abandoned ship in two lifeboats the sinking was accelerated with shots from the AA guns into the waterline at 16.00 hours. The U-boat went to the lifeboats for questioning, took care of three wounded survivors and provided them cigarettes, chocolate and provisions before leaving the area on a deception course.