"Bulgaria’s position is completely irrational and offensive to the Macedonians and our entire nation," Prime Minister Zoran Zaev said in a video address on Wednesday.
The funds would help the Western Balkans catch up economically with the rest of Europe.
Montenegro's opposition is on the cusp on forging a historic coalition, ending nearly 30 years of rule by the country's Democratic Socialists. There is a lot on the agenda to turn the country around.
Serbian President Aleksandar Vucic and Kosovo’s Prime Minister Avdullah Hoti both described the deal, a diplomatic boost for Donald Trump, as a "huge step forward".
Bosnia and Herzegovina depends on dirty coal. Hydroelectricity generation is a cleaner, greener alternative. So why are locals protesting against the building of dams and barrages
The United States, the EU and Russia are battling for influence over peace negotiations between Kosovo and Serbia.