Washington will not budge on its decision to impose fresh sanctions on corporations operating in Iran, despite a European request for exemption, a media report said on Monday.

The European Commission is investigating the bloc�s biggest sea-borne gas supplier Qatar Petroleum over potentially restrictive 20-year supply agreements.

Iran's powerful parliament speaker Ali Larijani said Sunday that the time for Europe to show it can save the nuclear deal was coming to an end.

The United States on Thursday said it was moving ahead with tariffs on aluminum and steel imports from Canada, Mexico and the European Union, ending a two-month exemption and potentially setting the stage for a trade war with some of America�s top allies.

The deputy head of Iran�s Revolutionary Guards warned Europe that if it threatens Tehran, the Guards will increase the range of missiles to above 2,000 kilometers, the Fars news agency reported on Saturday.

U.S. Senator Bob Corker, the Republican chairman of the Senate Foreign Relations Committee, urged President Donald Trump�s administration on Monday to work closely with European allies as it develops its new Iran policy.

Iranian Foreign Minister Mohammad Javad Zarif called on Monday for Europe to use its influence to defuse tensions in the Gulf where Saudi Arabia and its allies have cut ties with Qatar.