a Red Cross delegation. Healthier inmates, who were provided with new beds and bedclothes, were allowed to speak to the delegation, while sick and emaciated ones were killed. After the delegation left, camp conditions reverted to their prior state. Whenever he was pressed for information by the families of those detained at Jasenovac, Luburić remained equivocal. When a Croatian Jewish civil servant named Dragutin Rosenberg attempted to persuade him to allow food and clothing to be delivered to Jasenovac on a name-by-name basis, Luburić only agreed to bulk consignments, so as not to reveal which detainees were still alive. Luburić also proved impervious to bribes, as exemplified by the case of Julius Schmidlin, a Red Cross representative, who attempted to bribe Luburić into treating the inmates at Jasenovac more humanely, but was angrily rebuffed. In addition, Luburić did not tolerate the mishandling of goods seized from camp inmates, as exemplified by his response to the so-called Gold Affair, in which camp guards were caught attempting to smuggle confiscated jewellery out of Jasenovac. Luburić ordered that the culprits be killed. Among those killed was the brother of Luburić's deputy Ivica Matković, who was beaten to death. Kozara Offensive On 21 December 1941, Ustaše units under the command of Luburić, Rukavina and Moškov marched into Prkosi, near Bosanski Petrovac. Luburić declared: "We have to kill everyone, in Prkos [sic] and in all of their villages, to the last man, even children." The Ustaše proceeded to round up more than 400 Serb civilians, mostly women, children and the elderly. Shortly thereafter, they were led to a nearby forest and killed. On 14 January 1942, Luburić led a group of Ustaše into the village of Draksenić, in northern Bosnia, and ordered the killing of its inhabitants. More than 200 villagers were killed in the ensuing massacre, mostly women, children and the elderly. In mid-1942, the State Intelligence and Propaganda Bureau (; DIPU) issued a stern warning to all newspapers in the NDH, forbidding them from reporting on Luburić, Bureau III and the NDH's so-called "collection centers". Despite the DIPU's warning, Luburić was featured in a 1942 propaganda short film titled Guard on the Drina (, ). In June 1942, the Wehrmacht, Home Guard and Ustaše Militia launched the Kozara Offensive, aimed at dislodging Partisan formations around Mount Kozara, in northwestern Bosnia, which threatened Germany's access to the Belgrade–Zagreb railway line. Although the Partisans did