Tehran has denounced Washington's long-running economic pressure campaign as "economic terrorism" and a "crime against humanity", as the United States is touting a crippling financial offensive it calls "the toughest sanctions in history".

Iranian President Masoud Pezeshkian said Friday that it was time to end the months-long war, saying Tehran was in a position of "power and dignity", as talks between Iran and the United States remain on hold.

Nearing the six-month mark of the conflict, US President Donald Trump announced on Wednesday that Washington would wage an "unprecedented" economic warfare and isolation campaign against Iran. The push aims to force Tehran to dismantle its nuclear program and fully reopen the vital Strait of Hormuz, though he offered few concrete details.

"The perpetrators and instigators are deserving of trial and punishment for committing such heinous crimes," Iran's Foreign Ministry said in a statement on Thursday.

"They (sanctions) will undoubtedly have not the slightest effect on the determination of Iranians to safeguard Iran's independence and national sovereignty," according to the statement.