The Sajmište concentration camp (German: Konzentrationslager Sajmište, Croatian: Koncentracijski logor Sajmište, Serbian: Концентрациони логор Сајмиште; pronounced [sâjmiːʃtɛ]), also known as the Jewish camp in Zemun (German: Judenlager Semlin), was a Nazi concentration camp and extermination camp in Staro Sajmište on the territory of the Independent State of Croatia (NDH) during World War II. Located on the outskirts of Belgrade, it became operational in September 1941 and was officially opened on 28 October of that year. At the end of 1941 and the beginning of 1942, thousands of Jewish women, children and old men were brought to the camp, along with 500 Jewish men and 292 Romani women and children, most of whom were from the Serbian towns of Niš, Smederevo and Šabac. Women and children were placed in makeshift barracks and suffered during numerous influenza epidemics.