"America's decision that Iran's oil exports must reach zero is a wrong and mistaken decision, and we won't let this decision be executed and operational" Rouhani said.

"In future months, the Americans themselves will see that we will continue our oil exports," he said.

If the United States is able to stop one method for Iran to export oil, then it will find other ways, Rouhani said.

Oil prices hit  their highest since November last week after Washington said all waivers for sanctions-hit Iranian oil would end this week, pressuring importers to stop buying from Tehran and further tightening global supply.

The United States demanded last Monday that buyers of Iranian oil stop purchases by May 1 or face sanctions, ending six months of waivers that had allowed Iran's eight biggest customers, most of them in Asia, to continue importing limited volumes.

Ordinary Iranians are the ones who feel the pressure from U.S. sanctions, Rouhani said.