Iran has said an oil embargo adopted by European Union foreign ministers over the country's nuclear programme is "unfair" and "doomed to fail".
The measures would not prevent Iran's "progress for achieving its basic rights", foreign ministry spokesman Ramin Mehmanparast said.
The sanctions ban all new oil contracts with Iran and freeze the assets of Iran's central bank in the EU.
The EU currently buys about 20% of Iran's oil exports.
"European officials and other countries which are under America's political pressure... should consider their national interests and not deprive themselves of Iran's oil to help US officials achieve their secret aims," Mr Mehmanparast added.
He accused the US of trying to create "problems with energy supply requirements in countries which are America's economic rivals". Read More