Press secretary Karoline Leavitt says the US president believes there is a "substantial chance of negotiations" with Iran "in the near future".

Back-and-forth attacks between Israel and Iran continued overnight as the conflict entered its seventh day, with an inactive Iranian nuclear reactor and an Israeli hospital among the sites hit.

Inside the State Department, two officials said there have been intensive discussions in recent days about conducting a full evacuation of the U.S. Embassy in Israel; any decision on the matter is expected to be made by the White House. Most Republicans said that they agreed with Trump that Iran cannot have a nuclear weapon.