The U.S. military launched a second round of airstrikes Saturday targeting Iran at President Donald Trump’s direction as Tehran hit both Bahrain and Kuwait, underscoring rising tensions that threaten the interim deal between the two nations to stop the war.

The attack on Kuwait early Sunday was the first since the two sides signed a deal that aimed to halt fighting, and came as a multinational maritime body overseen by the U.S. Navy said Saturday that it would expand a route near Oman in the strait to allow for both inbound and outbound traffic — likely setting up a new flashpoint with Tehran.

The U.S. military’s Central Command said it struck Iranian military “surveillance infrastructure, communication systems, air defense sites, drone storage facilities and minelayer capabilities” following an attack on a ship at sea early Saturday morning. That ship, the Panamanian-flagged tanker Kiku, carried crude oil for the state-run energy company of Qatar, a key negotiator between Iran and the U.S.

In a social media post, Trump said the U.S. had “struck Iranian missile and drone storage locations, and coastal radar sites, for violating the Cease Fire Agreement, AGAIN!” He warned of a point where the U.S. may no longer be able to be reasonable “and will be forced to militarily complete the job.”

“If that happens, the Islamic Republic of Iran will no longer exist!” Trump wrote on Truth Social.