President Donald Trump said the US military struck three Iranian nuclear sites as the United States entered the conflict between Israel and Iran, raising fears of a wider war in the Middle East.

Israel and Iran traded new missile attacks early on June 22, in the hours after the US strikes, and Iran’s foreign minister said Tehran “reserves all options to defend its sovereignty, interest, and people” following what he described as an “outrageous” step by the United States.

Several world leaders called for a renewal of negotiations, with some in the West stressing that Iran must not acquire nuclear weapons, and the UN chief cautioned of a “growing risk that this conflict could rapidly get out of control.”

Trump announced what he called a “spectacular military success” on June 21, saying US bombers hit nuclear sites at Fordow, Natanz, and Isfahan in a joint effort with Israel to destroy Iran’s nuclear program after diplomacy failed to get Tehran to return to the negotiating table.