US Vice President JD Vance has warned that Washington will take further measures to prevent Iran from developing a nuclear weapon, while keeping military options open amid rising tensions in the Middle East.

Vance made the remarks at a policy event in Washington, where he said the United States was working with its allies to increase pressure on Tehran through diplomatic, economic and security measures.

He said the administration would focus on Iran’s nuclear programme and regional activities, including its support for armed groups, while also targeting its oil exports, drone capabilities and organisations associated with the Islamic Revolutionary Guard Corps.

According to Vance, the US will continue maintaining a military presence in the region to protect American personnel and safeguard shipping routes.

The warning comes as concerns grow over Iran’s uranium enrichment activities and reported attacks on commercial vessels in the Gulf.

US officials have also accused Tehran of backing proxy groups operating in Yemen, Iraq, Syria and Lebanon, which Washington considers a major source of instability across the region.

Iran, however, rejected the US position, describing Washington’s approach as another failed attempt to use threats and pressure against Tehran.

Meanwhile, Democratic Senator Chris Murphy cautioned against any escalation without congressional involvement. He argued that US policy should focus on reducing regional risks rather than relying on rhetoric.

Vance’s reference to the use of “all tools” is seen as leaving open a range of possible responses while signalling that the administration is prepared to act if Iran continues advancing its nuclear activities.

The US Secretary of State and Defense officials are expected to engage allies in Europe and the Middle East next week as Washington considers additional sanctions against Iran.