DUBAI, United Arab Emirates — Kuwait, Bahrain and Qatar sounded missile alert sirens early Thursday morning warning of an Iranian attack after the United States launched a new round of airstrikes targeting Iran.

There was no immediate word of damage in the three Gulf Arab countries. Kuwait’s military said it was actively intercepting incoming drones and missiles.

On Wednesday, Iran launched attacks on Bahrain and Kuwait over an earlier round of U.S. airstrikes against Iran. The latest U.S. strikes began Wednesday, hours after President Donald Trump said that recent Iranian attacks on ships in the Strait of Hormuz signaled the end of the fragile ceasefire.

The action raised fears that the war in Iran could reignite, coming just a day after the U.S. military hit a variety of military sites and port facilities following Iran’s targeting of several merchant vessels off the coast of Oman.

Military officials said in a social media post Wednesday that the latest strikes were intended to “further degrade” Iran’s ability “to threaten freedom of navigation” in the strait, through which a fifth of the world’s traded oil and natural gas passed before the war began with U.S. and Israeli attacks on Feb. 28.

Iranian state media reported explosions in several locations, including Bushehr, home to Iran’s nuclear power plant complex, and the southern port cities of Chabahar, Konarak, Bandar Abbas and Sirik.

Trump: ‘It will get much worse’ if Iran attacks ships

After leaving a NATO summit in Ankara, Turkey, Trump posted several videos on his social media site of what he said were explosions in Iran and issued another warning to the Islamic Republic.

“This is in retribution for yesterday’s bombing of ships by Iran. If it happens again, it will get much worse!” Trump wrote.

Trump had said earlier in the day that the latest back-and-forth fighting would not result in “long-term” military action.

“Anything that happens is going to happen very fast,” Trump said, though he also suggested the U.S. military might “just finish the job.”

Trump also renewed his past threats to hit Iran’s civilian infrastructure, including electric plants and desalinization plants, and to seize the oil-production hub of Kharg Island.

After three tankers were hit Tuesday, the U.S. launched strikes on Iran, and Iranian forces retaliated by attacking American military sites in the Persian Gulf.

Iran has asserted that the interim ceasefire deal gives it the right to manage traffic through the strait. Parliament Speaker Mohammad Bagher Qalibaf, a key negotiator in talks seeking a permanent end to the war, was defiant in a post on X: “The era of bullying and extortion is over. It leads nowhere. We don’t fold.”

Trump fueled concerns that the war could restart by saying the interim agreement to pause fighting was “over,” although he added that he would allow negotiations to continue.

Attacks have repeatedly threatened the shaky ceasefire, but Trump’s comments added new uncertainty, and oil prices shot up after he spoke. A renewed conflict could engulf the wider Middle East and would likely again halt energy shipments through the strait.

“For me, I think it’s over,” Trump said when asked about the status of the ceasefire. He added that U.S. representatives can continue negotiations, but he cast doubt on the outcome. “They can talk, but I think they’re wasting their time,” he said.