Eight Bulgarian neo-Nazis, who were planning to travel to the Serbian city of Novi Sad, were arrested on Sunday in the capital Belgrade, Serbian police said.
The Bulgarians planned to travel to the Serbian city of Novi Sad, where 26 people had clashed with an anti-fascist demonstration later in the day.
Serbia's National Front defied an injunction from local authorities, which banned them from having their own march, which they had scheduled to coincide with the birthday of Heinrich Himmler, the commander of the SS in Nazi Germany.
The police arrested 15 people from the National Front, as well as 11 Slovak nationals, who were found to be in possession of knives, Nazi swastikas, fascist flags and propaganda material.
The neo-Nazi National Front is led by Goran Davidovic, jailed on charges of spreading racial hatred, and is strongly opposed to the secession of the Kosovo province, populated predominantly by Albanians, from Serbia.