President Donald Trump says the U.S. military struck three sites in Iran, inserting itself into Israel’s effort to decapitate the country’s nuclear program in a risky gambit to weaken a longtime foe amid Tehran’s threat of reprisals that could spark a wider regional conflict.

Iran’s foreign minister Abbas Araghchi is preparing to meet Russian President Vladimir Putin, saying he expected their conversation to “be in the interests of both countries”. Araghchi said late on Sunday night that he would have “serious and important discussions” with Putin in Moscow.

It remained to be seen whether the attack would ignite a regional war or provide the U.S. and Iran with an off-ramp from their intensifying confrontation.