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US President Donald Trump, in an interview with Maria Bartiromo on Fox Business Network on Wednesday, said that if you give Iran a nuclear weapon, "the world will be blown up", reports the BBC.
He added that once the war with Iran settles, gas prices will go down "tremendously", adding that electricity prices will decrease too, the report says.
Trump described the Iran nuclear deal, signed in 2015, as the "worst deal ever made" - and said it gave the country a "short term path" to a nuclear weapon, according to the report.
He added that if the US did not bomb Iran's nuclear facilities last year, the country would have used a nuclear weapon on Israel and its Middle East neighbours, as well as the US, the BBC report says.
Iran has always said that its nuclear programme is entirely peaceful and that it has never sought to develop a nuclear weapon.
Trump said that after he heard reports that China was giving weapons to Iran, he wrote a letter to President Xi asking him not to, according to the report.
Xi wrote Trump a letter back, "essentially" saying China isn't doing that, Trump added.
In a post on Truth Social, Trump said, "China is very happy that I am permanently opening the Strait of Hormuz. I am doing it for them, also - And the World."
"This situation will never happen again. They have agreed not to send weapons to Iran," he wrote, says the BBC report.
"We are working together smartly, and very well! Doesn’t that beat fighting??? BUT REMEMBER, we are very good at fighting, if we have to - far better than anyone else!!!"
On Tuesday, China called the US naval blockage of Iranian ports "irresponsible", and said it could "undermine" the ceasefire. Up until the US blockade, Chinese vessels had been among the very few managing to make their way through the Strait of Hormuz, according to the report.
A Chinese foreign ministry spokesperson also told a news conference on Tuesday that reports China was preparing to deliver new air defence systems to Iran were "completely fabricated".