Tehran (Reuters): Iran accused the United States on Sunday of threatening Russia with new atomic weapons after Washington published a document outlining plans to expand its nuclear capabilities to deter others.

The review of US nuclear policy published on Friday has riled Russia , which viewed the document as confrontational, and raised fears that it could increase the risk of miscalculation between the two world powers.

“The Americans are shamelessly threatening Russia with a new atomic weapon,” Iranian President Hassan Rouhani , a pragmatist who opened the way to Tehran’s 2015 nuclear deal with world powers including longtime adversary Washington, said in a speech.

“The same people who supposedly believe that using weapons of mass destruction is a crime against humanity ... are talking about new weapons to threaten or use against rivals,” he said in his televised address.

Foreign Minister Mohammad Javad Zarif earlier warned in a tweet that the U.S. policy document posed the risk of “bringing humankind closer to annihilation”.

The US military has put countering China and Russia , dubbed “revisionist powers”, at the centre of a new national defence strategy unveiled earlier this month shifting priorities away from fighting Islamist militants.

By expanding its own low-yield nuclear capability, the United States would deter Russia from using nuclear weapons, according to American officials.