STORY: The incident happened in the early hours in the north Serbian town of Horgos, police said.
Video footage obtained by Reuters showed a group of men carrying riffles walking near residential buildings in Horgos on Thursday night (November 24).
A police operation eventually found around 600 migrants in the area, as well as weapons and some of those involved in the shootout, the Interior Ministry said in a separate statement, citing Interior Minister Bratislav Gasic, who visited the migrant camp on Friday.
The Western Balkans route via Turkey, Bulgaria, North Macedonia and Serbia remains the main migratory path into the European Union, border agency Frontex said in September.
Many migrants are crossing borders using elaborate networks of smugglers who are sometimes armed.
Last week, Serbia agreed with Hungary and Austria to deploy more joint border patrols and align its visa policies with those of the EU to stem the flow of illegal migrants to the west through the Western Balkans.