(ANSA) - BELGRADE, 06 DEC - Austrian and Moldovan law enforcement authorities, coordinated by Europol, have dismantled and arrested the members of "an organized crime group suspected of smuggling nuclear materials," Europol said in statement today. The operation "targeted a group of criminals when they attempted to sell nuclear container which allegedly contained radiological material to an army for 3 million euro," Europol said, without providing further details. During the operation three persons were arrested in Vienna. Two of them had criminal records, and one of them had been already convicted for a similar crime in the past, Europol added. A video, posted on the Europol official website, shows several moments of the investigation and the intervention of the Austrian police, with an helicopter, for the arrest of the suspects. Trafficking in nuclear and radiological materials is "a potential risk to the EU internal security," Europol noted, adding that "the likelihood of the illegal movement" of this type of material "remains due to the increased availability of misappropriated radiological sources from different conflict zones and their further trade." (ANSA).