TEHRAN — Iran's Revolutionary Guards are not tied to "a specific geographical area" in defending the "vital interests" of the Islamic republic, its commander said on Thursday, in an apparent retort to Washington.

Guards commander Major General Hossein Salami, quoted on the official Guards website, Sepahnews, spoke after The New York Times on Monday said that Donald Trump had recently asked top aides about the possibility of striking Iran's nuclear facilities.

But senior US officials dissuaded Trump "from moving ahead with a military strike", warning that such an attack could escalate into a broader conflict in the last weeks of his presidency, the Times wrote.

Salami noted Iran's position in the energy-rich Gulf, calling it a "strategic region for the world economy" in which Iran has "a privileged and unique role in ensuring the safety of the maritime expanse".

Salami was speaking at the inauguration of a new warship equipped with "missile systems", a helipad and capabilities to launch drones from, as well as to transport speedboats, Sepahnews said.

"We are not limited to a specific geographic area to defend our security and our vital interests," Salami said.

"If some want to threaten the interests of this great nation and country, they will certainly not be safe anywhere on Earth," he added.

He insisted Iran would not make the first move of aggression towards another country, but said that our "defence strategy is always accompanied by offensive tactics".

Tehran and Washington, enemies for more than four decades, have edged to the brink of war twice since June 2019, amid tensions over a 2015 international nuclear agreement.

Trump's withdrawal from the nuclear agreement in 2018 was followed by the unilateral reimposition of crippling economic sanctions which prompted Iran to suspend some of its obligations under the deal.

Iran argues it has moved away from its commitments because of the sanctions and the inability of the other parties — Britain, China, France, Germany and Russia — to provide it with the deal's promised economic benefits.