By Steve Holland, Parisa Hafezi and Alexander CornwellWASHINGTON/DUBAI/JERUSALEM (Reuters) -Iran and Israel traded further air attacks on Thursday as President Donald Trump kept the world guessing about whether the United States would join Israel's bombardment of Iranian nuclear facilities.

Iran and Israel continue strikes on Wednesday night, after Donald Trump says the US "may" join the Israeli attacks.

As Israeli strikes kill top Iranian generals, take out air defenses and damage nuclear sites, many wonder if President Donald Trump will deepen U.S. involvement in the conflict.

As fighting between Iran and Israel continued for a sixth day, the U.S. Embassy in Jerusalem made its first announcement for Americans trying to leave Israel.

The U.S. Embassy in Jerusalem said earlier it was working on dispatching evacuation flights and cruise ships for American citizens who wish to leave Israel.