Iran says new sanctions threatened by 'desperate' US will fail

US Treasury Secretary Scott Bessent has threatened to impose "the toughest sanctions in history" on Iran.

Iran's foreign minister dismissed the threat of new US sanctions as a sign of desperation on Sunday and said the expected new measures would fail to defeat Tehran.

Araghchi said Washington must speak to Iran respectfully to find "a solution based on justice and honour." (REUTERS)

US treasury secretary Scott Bessent, who is due to hold a press conference at 2 pm EDT (1800 GMT) on Monday, has threatened to impose "the toughest sanctions in history" on Iran.

Iran's economy is already under huge pressure from international sanctions, its infrastructure has been hit repeatedly and thousands of people have been killed in airstrikes on the Islamic Republic since the US and Israel launched attacks on February 28.