Later that day, an iron ore ship (the , travelling from Stettin, in northern Germany) was sunk in the Skagerrak by the Polish submarine . The ship was carrying troops, horses and tanks for the German invasion of Norway, part of Operation Weserübung. Around half of the 300 men on board were drowned, with the survivors telling the crews of the Norwegian fishing boats that picked them up that they were on their way to Bergen to defend it from the British. A few hours later, two other German ships (the "Posidonia" and the "Krete") were also sunk in the same area.