fortress town of Kladovo. About 1,100 refugees were stranded there and came to be known as the Kladovo-Sabac Group. In May 1941, they were still in Yugoslavia, where 915 of them were caught and eventually killed by the invading Nazis. The 800 men were shot by Nazi soldiers in a farmer's field at Zasavica; after the war, the remains of the men were re-interred in a mass grave in the Belgrade Sephardi Cemetery. The women and children were imprisoned in the Sajmiste concentration camp where they perished from hunger, disease, exposure to the bitter cold winter weather, or gassed to death in a mobile gas truck. On 18 May 1940 the old Italian paddle steamer Pencho sailed from Bratislava, with 514 passengers, mostly Betar members. The Pencho sailed down the Danube to the Black Sea and into the Aegean Sea. On 9 October, her engines failed and she was wrecked off Mytilene, in the Italian-ruled Dodecanese Islands. The Italians rescued the passengers and took them to Rhodes. All but two were then placed in an internment camp at Ferramonti di Tarsia in southern Italy. They were held there until Allied forces liberated the area in September 1943. In October 1940, 1,770 Jewish refugees sailed from Tulcea to Haifa in two ships. The arrived off Haifa on 1 November, followed a few days later by the . The Royal Navy intercepted each ship and escorted it into Haifa, where British authorities detained the refugees before transferring them to a requisitioned French ocean liner, the , for deportation to Mauritius. They were followed from Tulcea by another 1,634 refugees aboard the , which arrived on 24 November off Haifa, where the Royal Navy escorted her into harbour. On November 25 the British had just started transferring Atlantics refugees to Patria when Haganah agents planted a bomb aboard the French liner with the intention of disabling her to prevent her from sailing. However, the bomb quickly sank Patria, killing 260 people and wounding 172. The survivors were allowed to stay in Palestine on humanitarian grounds. In October 1940, a large group of refugees were allowed to leave Vienna. The exodus was organized by Berthold Storfer, a Jewish businessman who worked under Adolf Eichmann. They took four river boats, Uranus, Schönbrunn, Helios, and Melk, down the Danube to Romania, where the Uranus passengers, about 1,000, boarded the Pacific, and sailed on 11 October 1940.