Serbian mafia is the leading criminal group in Montenegro. Many of the Belgrade crime groups that were not caught during Operation Sablja hid in Montenegro. The Zemun clan is active in Montenegro. Netherlands There have been a number of unsolved murder cases in Rotterdam that have been linked to the activities of Serbian Organized Crime gangs. In recent years the Serbian mafia has been growing strong in the Netherlands. By 2004, ecstasy and heroin in Netherlands had originated from the Balkans. Sreten Jocić (aka "Joca Amsterdam"), is a hitman and a drug dealer. He is considered the leader for the Serbian mafia in Amsterdam. On Christmas Eve, 1974, Slobodan Mitrić killed three alleged UDBA members in Amsterdam. In 1977, Emilio Di Giovine was wounded and two of his men killed by rival Yugoslavs. On 24 October 1979, Arkan, Slobodan Kostovski, and an unnamed Italian accomplice were arrested while robbing a jewelry store in Amsterdam, they had days earlier robbed a jeweller in Hague and were sought in several countries. On 8 May 1981, Arkan escaped from the Bijlmerbajes prison in Amsterdam with Sergio Settimo, an Italian national, one of the most sought-after criminals in Europe. In 1992, a member of the Chinese Triad was killed after a debt to the Serbian Mafia. The Serbian OC groups have become stronger and has superseded the Russian Mafia in Netherlands and the arms trade is shared by Serbian and Turkish groups. Norway Non-Norwegian gangs and organized crime groups came to dominate Norway's drug trade in the 1980s. During the 1990s Norway saw a large influx of Yugoslavs seeking refugee status due to the conflict in the Balkan region. Slovenia Slovenia has witnessed a growing trend of human trafficking by Balkan organized crime groups since 2004. Serbian organized crime has operated the cigarette smuggling and arms trafficking. Spain A growing trend of auto theft was seen by southeastern European organized crime groups since 2004. Serbian organized crime groups grew their presence in Spain. Sweden Known in Swedish as: Serbiska maffian or Serbiska Brödraskapet, earlier Jugoslaviska maffian or Juggemaffian during the years of Yugoslavia. And more specifically known as the Serbian Brotherhood encompassing territory from Sweden to Denmark. The Serbian mafia or Serbian Brotherhood in Sweden was said to be the top criminal organisation, but its influence has declined since the deaths of several leading figures. A war was fought over the control of the