Romanian far-right pro-Russian presidential contender Calin Georgescu will challenge a decision to bar him from taking part in a rerun of the election in May, one of his advisers told Reuters on Monday.
On Sunday, Romania's central election authority said it had decided to bar Georgescu's candidacy, saying it was inadmissible after the Constitutional Court's annulment of the December vote.
Challenges to decisions by Romania's central election authority must be filed within 24 hours. The Constitutional Court should rule on Georgescu's appeal by Wednesday.
Analysts have said it is unlikely that the top court will allow Georgescu to run again for the presidency in Romania, a member state of the European Union and NATO which shares a long border with Ukraine.
The court set a precedent in October when it blocked the candidacy of another far-right candidate, arguing that her anti-European, pro-Russian views made her unfit for office.
If the court upholds the central election authority's decision, the three ultranationalist parties, which hold 35% of seats in parliament and which backed Georgescu's previous bid for the presidency, risk having no candidate in the May election.
George Simion, leader of the opposition Alliance for Uniting Romanians (AUR), the second largest party in Romania's parliament, said he would meet with Georgescu on Monday.
Asked if he was considering submitting his own candidacy, Simion told reporters:
"We wait to see what Mr. Georgescu will say. We are not ruling out any options, but we are not speculators."
Georgescu is under criminal investigation on six counts, including membership in a fascist organisation and communicating false information about campaign financing. He has denied any wrongdoing.
