Iran likely can resume uranium enrichment to make a nuclear bomb in a few months, despite damage to nuclear facilities by United States and Israel airstrikes, the United Nations' nuclear watchdog chief said.

The assessment widens the divide with President Trump, who has claimed that Tehran has given up its nuclear ambitions after a U.S. attack.

IAEA Director General Rafael Grossi looks on during a doorstep with Austrian Chancellor Christian Stocker, Austrian Vice-Chancellor Andreas Babler and Austrian Foreign Minister Beate Meinl-Reisinger at the Austrian Chancellery in Vienna,