rewrite this title in Arabic Serbia's ruling populists claim 'pure and convincing' victory in municipal elections

Summarize this content to 2000 words in 6 paragraphs in Arabic Skirmishes between police and opposition supporters were reported in some areas amid claims the SNS had set up illicit ‘call centres’ to rally supporters to vote for them. One opposition coalition leader slammed the vote as marked by “abuse of the media, fake news and hate speech”.