were executed in February 1945. The total number killed at Grini is unknown, though the Gestapo and police often used the area for purposes of torture and at least eight people were executed there. British airborne troops sent by glider to sabotage the Norsk Hydro heavy-water plant during Operation Freshman crashed in Norway due to foul weather. The five uninjured survivors were taken prisoner and held at Grini concentration camp until 18 January 1943, when they were taken to nearby woods, blindfolded and shot in the back of the head by the Gestapo. This was a war crime, in breach of the Geneva Convention. Executions normally took place at Akershus Fortress or Trandumskogen. Camps in other parts of Norway, including Fannrem, Kvænangen and Bardufoss, were organized as part of the Grini system. German forces also maintained a military camp at Huseby, not far from Grini. Prison life Other than guards, the German occupiers devoted few personnel to the camp. Since many politicians, academics and cultural personalities were detained at Grini, a certain level of internal organization was established. Prisoners worked in manufacturing, agriculture and other manual labor. Much of this manual labor took place outside the camp. Some detainees maintained their pre-war specialties, such as literary historian Francis Bull who secretly held several lectures, and managed to publish three books with material written during his three-year stay at Grini. The diet at Grini was poor. After the war, it caused a certain stir in the populace when it was perceived that Nazi prisoners of the liberated Norway were treated better than prisoners of the Nazi regime; among other things the diet in Norwegian prisons was much better. On the other hand, Grini was more hospitable to resistance prisoners than the similar camps in Germany. Liberation On 7 May 1945 Harry Söderman, who was in charge of the education of the Norwegian police troops in Sweden, arrived in the camp and ordered commander Zeidler to arrange an assembly, first for the 5,000 male prisoners, and then for the 500 females. The women were released immediately, while the male detainees were asked to stay in the camp for a few days until transport could be arranged, and leadership of the camp was handed over to the prisoners' representatives. Prisoners from Møllergata 19 and Victoria Terrasse were transferred to Grini the same day. After the war After the liberation of Norway in May