Israel appeared to be expanding its air campaign on Tehran five days after its surprise attack on Iran's military and nuclear program, as U.S. President Donald Trump posted an ominous message warning residents of the city to evacuate.

The risk of conflict is growing as Iran signals strikes on Israeli nuclear facilities despite ongoing nuclear talks.

Donald Trump said late on Monday his early departure from the Group of Seven nations summit has "nothing to do with" working on a ceasefire between Israel and Iran, denying comments by French President Emmanuel Macron who said the U.