Washington, New York- US President Donald Trump has accused Iran of “not living up to the spirit” of the nuclear deal struck with world powers, warning America would set out its position on that soon.

“Iran has not lived up to the spirit of the agreement, and they have to do that,” Trump said on Thursday in a joint news conference in the White House with Italy’s visiting Prime Minister Paolo Gentiloni.

“We’re analyzing it very, very carefully and will have something to say about it in the not-too-distant future.”

“It was a terrible agreement,” said Trump, who has regularly blamed his predecessor Barack Obama for securing the landmark 2015 nuclear deal. “That was a bad one, as bad as I’ve ever seen negotiated.”

On Thursday, the US ambassador to the UN, Nikki Haley, told the 15-member Security Council that Iran is the “chief culprit” in conflicts in the Middle East.

She urged the Council to make handling the country a “priority.”

Her remarks came a day after US Secretary of State Rex Tillerson called the nuclear pact a failure and warned Iran risked becoming another North Korea: a hostile, nuclear-armed state.

He said Iran is “the world’s leading state sponsor of terrorism” and highlighted its military support of the head of the Syrian regime, Bashar al-Assad, Houthi rebels in Yemen and militias in Iraq and in Lebanon.

Tillerson accused Iran of “alarming ongoing provocations” to destabilize countries in the Middle East.

In the first reaction to Tillerson’s remarks from a senior Iranian official, Iranian Foreign Minister Mohammad Javad Zarif tweeted that the United States should “fulfill its own commitments.”