Iran has said it will thwart US efforts to block its oil exports. In a television broadcast, Iran's First Vice President, Eshagh Jahangiri said that his country will thwart the US plan.
He also said that Saudi Arabia would never take Tehran's place on the international oil market.
Mr Jahangiri's remarks come a day after US President, Donald Trump said that Saudi Arabia's King Salman had agreed to his request to ramp up
oil production.
Iran possesses the second-largest gas reserves on the planet, after Russia, and the fourth-largest oil supplies, while Saudi Arabia is the world's biggest oil exporter.
Earlier, the United States exited from the nuclear deal between Iran and world powers in May. The US said it would reimpose economic sanctions on the Islamic republic and its business partners by November 4.