PM IAEA director general says Iran's nuclear program set back, but couldn't say how long Iran’s nuclear program has been set back "significantly," the director general of the International Atomic Energy Agency said in an interview on Fox News Tuesday.

Israel ratcheted up attacks on Iran even as Tehran vowed to retaliate against US strikes on its nuclear facilities over the weekend, fueling fears of a wider war in the Middle East and rattling global markets.

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The truce went into effect after pressure from President Trump and Qatar. Israel said its forces were now shifting their attention back to Gaza.

It remains to be seen how long the truce will hold and whether it will pave the way for a nuclear deal between the U.S. and Iran.