By David Lawder and Humeyra PamukWASHINGTON, Aug 24 (Reuters) - President Donald Trump's administration on Monday announced an expansion of secondary sanctions it can impose on entities and countries that maintain business ties with Iran around the world as Washington significantly ratchets up economic pressure on Tehran with the war nearing its 6-month mark.

Treasury secretary Scott Bessent announces ‘economic D-Day’ as war with Iran nears six-month mark

Tehran has threatened to retaliate against any country that joins new US economic measures.

Washington vows to isolate Tehran in 'economic D-Day' as Trump cranks up pressure on allies

The United States is set to launch a significant financial offensive against Iran. This move aims to pressure countries to sever economic ties with Tehran. Measures will broaden…

The Trump administration has expanded its secondary sanctions against entities and countries doing business with Iran, warning them to cut ties with Tehran or risk losing access…