US President Donald Trump has announced he could impose additional tariffs on countries that continue to trade with Iran, signing an executive order this past Friday.

The order does not specify the rate that could be imposed, but uses 25% as an example and states it will apply to goods imported into the US from any nation that 'directly or indirectly purchases, imports, or otherwise acquires any goods or services from Iran.'

Although Trump has not commented directly on the order, he reiterated a firm stance on preventing nuclear weapons for Iran while addressing reporters aboard Air Force One Friday night.

This move coincides with ongoing talks between US and Iranian officials in Oman, amidst heightened threats from both nations.

Earlier in the year, Trump had threatened a similar 25% tariff on countries engaging in business with Iran, proclaiming it would take effect immediately.

The White House has indicated that this executive order reaffirms the 'ongoing national emergency with respect to Iran', and noted that the president may adjust it if circumstances change.

Trump's administration holds Iran accountable for its nuclear pursuits, support for terrorism, and actions that destabilize the region.

As tension escalates, many fear a potential conflict, with chronic issues surrounding Iran's nuclear program and human rights violations weighing heavily on international relations.

Negotiators are set to consult back in their respective capitals after these discussions, with both sides expressing cautious optimism about moving forward.