Police in Serbia Fire Tear Gas at Election Protesters Threatening to Storm Capital’s City Hall

BELGRADE, Serbia—Riot police in Serbia fired tear gas to prevent hundreds of opposition supporters from entering the capital’s city council building on Christmas Eve in protest of what election observers said were widespread vote irregularities during a general election last weekend. The country’s populist authorities have denied rigging the vote and described the election to fill parliament and local offices as fair. Serbian President Aleksandar Vucic said Sunday that those claims were blatant ”lies” promoted by the political opposition. Vucic also suggested the unrest was instigated from abroad. Addressing the nation during the protest outside Belgrade city hall, he called the demonstrators “thugs” who would not succeed in destabilizing the state and said, “This is not a revolution.”...