Iran has the capacity to start enriching uranium again - for a possible bomb - in "a matter of months", the head of the UN's nuclear watchdog has said.

Rafael Grossi, head of the International Atomic Energy Agency (IAEA), said US strikes on three Iranian nuclear sites had caused severe but "not total" damage to the enrichment programme.

That contradicts claims by US President Donald Trump that the US bombing had “totally obliterated” the nuclear facilities.