President Donald Trump signaled Monday that the ongoing conflict between Israel and Iran was intensifying rapidly, announcing he would return to Washington a day early from the Group of 7 summit in Canada to monitor developments after issuing an ominous warning to Iranians to “immediately evacuate” their capital city.

President Trump’s early departure comes after a White House official said he had decided not to sign onto a G7 statement about Israel and Iran. In the end, he did sign it.