The US Treasury is expected to expand the scope of secondary sanctions it can impose on companies and countries that continue doing business with Iran, as part of a campaign that US President Donald Trump describes as “economic D-Day,” Reuters reports, citing a source.


The source said the move is intended as a final warning to countries to cut their commercial ties with Iran, in an effort to pressure Tehran to end the nearly six-month conflict that has disrupted traffic through the Strait of Hormuz and affected Gulf energy exports.


The source spoke on condition of anonymity because they were not authorised to discuss the plans publicly.


According to the source, US Treasury Secretary Scott Bessent is expected to provide further details on the measures at a press conference scheduled for 1 p.m. EDT (1700 GMT) on Monday.


Bessent will also outline a broader economic pressure campaign against Iran that he and President Donald Trump have described as an "economic D-Day."


The Treasury chief is expected to make clear that countries must choose between aligning with Washington or risking having major companies and entities cut off from the dollar-based global financial system.


By Bakhtiyar Abbasov