U.S. President Donald Trump late Friday said the U.S. had launched air strikes on Kharg Island, targeting only military assets in what he called one of the “most powerful bombing raids in the History of the Middle East.” The island, a 5-mile strip of land, is home to Iran’s most important oil facility, where roughly 90 percent of the country’s crude is processed.

Trump said the U.S. attack spared vital oil infrastructure on the island.

But “should Iran, or anyone else, do anything to interfere with the Free and Safe Passage of Ships through the Strait of Hormuz, I will immediately reconsider this decision,” he said on social media.

On Saturday, Trump said “many countries … will be sending war ships, in conjunction with the United States of America, to keep the Strait open and safe.”

“Hopefully China, France, Japan, South Korea, the U.K., and others, that are affected by this artificial constraint, will send ships to the area so that the Hormuz Strait” can be protected, Trump said in a post on Truth Social.

The Fars news agency reported at least 15 explosions on Kharg Island with thick smoke rising over the island following the U.S. attack. The agency said the strikes targeted an air defense facility, a naval base, the airport control tower, and an offshore oil company’s helicopter hangar. No oil infrastructure was damaged in the attack, it said.