Romania's Social Democrat Prime Minister Marcel Ciolacu faced calls to resign on Monday after a far-right opposition leader won the first round of the presidential election re-run, heightening political uncertainty in the country.

Far-right candidate George Simion was declared the winner Monday in the first round of Romania's presidential election.

Presidential candidate George Simion walks holding a picture of Romanian holy icon of Protection of the Theotokos presented by a supporter outside a polling station during the country's first round of the presidential election,