The all-caps post came hours after weekend bombings in Iran rattled oil markets and reignited fears of rising fuel costs.

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.

It was an unprecedented attack years in the making, with some last-minute misdirection meant to give the operation a powerful element of surprise.