The US has reimposed its "toughest ever" sanctions against Iran on Monday.
The US sanctions will hit oil exports, shipping and banks - all core parts of the economy. As part of the US sanction, mass protests have broken in the oil-rich nation.
US secretary of state Mike Pompeo has defended the re-imposition of sanctions on Iran, saying the new tough controls on oil, shipping and banking that start on Sunday at midnight will force Tehran to stop sponsoring terrorism.
Thousands of Iranians chanting "Death to America" rallied on Sunday, rejecting calls for talks. Iranian President Hassan Rouhani has vowed to sell his country's oil and break the sanctions.
The military was also quoted as saying it would hold air defence drills on Monday and Tuesday to prove the country's capabilities.UNI