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.

After canceling negotiations with the U.S. scheduled for Sunday, Tehran has signaled it is willing to talk.

The US president said he would end wars and now a vocal part of his support is urging him to stay out of this conflict.

President Trump rejected an Israeli plan in recent days to kill Iran's Supreme Leader Ayatollah Ali Khamenei, a senior U.S. official told USA TODAY.

Israel has no intention of deliberately harming the residents of Tehran, Israeli Defence Minister Israel Katz said, walking back earlier comments he had made on Monday. "I wish to clarify the obvious: there is no intention to physically harm the residents of Tehran as the murderous dictator does to the residents of Israel,