Sinisa Karan, a close ally of Milorad Dodik, the ousted president of Bosnia's Republika Srpska, won the snap presidential election in a close race with the opposition candidate on Sunday.
Karan won 50.89% of the vote, according to preliminary results announced before midnight by the Central Election Commission of Bosnia and Herzegovina.
His opponent from the Serbian Democratic Party, Branko Blanuša, won 47.81 percent of the vote.
Dodik stepped down as president of Republika Srpska in August after being convicted of failing to comply with decisions by the international representative, Christian Schmidt, who oversees the peace agreement that has kept Bosnia united since the end of the interethnic war in the 1990s.
The snap elections in Republika Srpska (RS) – one of Bosnia's two semi-autonomous entities, alongside the Bosniak-Croat federation – were seen as a crucial test of support for Dodik's nationalist party, which has been in power for nearly two decades.
Karan will serve for less than a year, until the general election in October 2026.
Voting centers opened at 7:00 AM and closed at 7:00 PM.
About 35.7 percent of over 1.2 million eligible citizens cast their votes in these elections.
The elections were held after years of clashes between Bosnia's top representative, Christian Schmidt, and Dodik - clashes that, according to many analysts, brought the country to the brink of the most serious political crisis since the end of the 1992-1995 war.
Earlier this year, Dodik was convicted and banned from holding public office for six years for failing to implement Schmidt's decisions.
After initially ignoring the decision for months, Dodik, who has close ties to the Kremlin, suddenly accepted his dismissal in October.
During the campaign, Karan was openly promoted as a continuation of Dodik's legacy.
He was present at Thursday's closing rally, where Dodik, who during the campaign called Bosnia an "impossible state," promised that the drive towards statehood for Republika Srpska would continue.
"Our vision is freedom, and there is no freedom without a state," Dodik told crowds in the Bosnian Serb administrative capital of Banja Luka.
Meanwhile, Blanusha has blamed Dodik's policies for endangering the entity's future and accused him of corruption.
"He has humiliated the institutions of RS for his personal interests and wealth," Blanusa said during an election campaign event earlier this week.