Serbian police have arrested at least eight men they say are shown in a video killing a group of Bosnian Muslim prisoners from Srebrenica, a top Belgrade official said Thursday. The arrests came after the footage was shown Wednesday at the U.N. court in The Hague, Netherlands, said Rasim Ljajic, head of the Serbia-Montenegro government body in charge of cooperation with the U.N. war crimes tribunal. The prosecution introduced the footage during the hearings in the trial of former President Slobodan Milosevic, indicted for his alleged role in atrocities during the Balkan wars, including the Srebrenica massacre. The amateur footage, apparently made by Serb troops, showed six civilians taken from a truck, hands tied behind their backs and lined up on a hillside. Four were shot one by one in their backs. Two other prisoners were ordered to carry the bodies into a nearby barn where they too were killed.U.N. prosecutors contend the killings were carried out by the Serb paramilitary unit known as the Scorpions somewhere on Mount Treskavica near the wartime Bosnian Serb capital Pale. The Scorpions were allegedly under orders from Serbian police in Belgrade and the link could directly tie Milosevic with the crimes committed in Bosnia. The footage was broadcast late Wednesday by several television channels in Serbia and shocked the Balkan republic. It also prompted the police sweep, Ljajic said. Those arrested were all identified as the executioners shown in the footage, he said. Earlier Thursday, during a visit to Belgrade by U.N. Chief Prosecutor Carla Del Ponte, Serbia's Prime Minister Vojislav Kostunica announced that "several suspects" from the footage shown at The Hague court were detained. Del Ponte praised the arrests as a "brilliant operation." "The police will continue the sweep until all suspects are in custody," Ljajic said.