Thousands of opposition supporters marched in the Serbian capital, Belgrade, on Tuesday in a protest against the government, demanding the annulment of last month’s elections. That election process has been described as unfair, according to international observers.

The ruling party, the Serbian Progressive Party (SNS) won 46.72 percent of the votes in early parliamentary and local elections.

However, an international monitoring mission has said that the SNS has secured an unfair advantage through media bias, the influence of Serbian President Aleksandar Vučić and election irregularities, including vote buying.

Vučić and his allies have said that the elections were fair. The march was also organized to mark the sixth anniversary of the murder of Oliver Ivanović, the Kosovo Serb politician.

Ivanović was killed in front of his party’s office in 2018 in North Mitrovica. Investigations into the murder of Ivanović are continuing in Kosovo and Serbia.

In an address to the crowd, Marinika Tepić, leader of the alliance Serbia against Violence (SPN), which came second in the election, said that the opposition continues to be determined to contest the election result.

“The whole planet knows, we captured him [Vučić], who does not dare to appear in front of his people”, said Tepić, who last week went on a two-week strike to protest the election result.

The opposition has said that it wants the elections in Belgrade to be cancelled.

On Monday, Miloš Vučević , leader of the SNS, said that the elections in Belgrade could be repeated, if no one manages to create a coalition and secure a majority in the municipal assembly.

With a population of 1.4 million, Belgrade accounts for about a quarter of the electorate in Serbia, and the capital’s leader is considered one of the most influential officials in the country.