US President Donald Trump on Wednesday said the ceasefire with Iran was “over” after fighting flared between the two countries sparked by Iranian attacks on ships in the vital Strait of Hormuz.

The strategic shipping route remains a flashpoint in the conflict, which began in late February with massive US-Israeli strikes on Iran.

Tehran insists on controlling the waterway, saying it will charge fees for passage and threatening to hit vessels that deviate from its authorized route.

Its military has struck at least three ships in recent days, which prompted extensive US strikes against Iranian targets on Tuesday followed by retaliatory attacks by Iran on Gulf countries.

“As far as I’m concerned, it’s over,” Trump said at the NATO summit in Turkey on Wednesday when asked if the truce was still intact, adding, “It’s just a waste of time dealing with them.”

“I’ll let our wonderful negotiators keep talking if they want, but I don’t see it. I don’t like these people,” he said.

Oil prices jumped five percent after Trump’s remarks.

Both sides reported hitting dozens of targets, placing fresh strain on an interim deal to end the war and pushing oil prices to their highest level in two weeks.

Iranian state media on Wednesday reported a wave of explosions around the strait, including six on the island of Qeshm, seven in the city of Sirik, and more in the major port city of Bandar Abbas.

It later also reported a series of blasts in the port city of Bushehr, which hosts the country’s only civilian nuclear power plant and lies near Kharg island, the main oil terminal through which 90 percent of the nation’s crude exports transit.

State media said a member of the military’s Revolutionary Guards was killed in Iran’s southwest.

The US Central Command (Centcom) said its forces had struck over 80 targets, including Iranian air defense systems, coastal radar sites, and 60 Islamic Revolutionary Guard Corps small boats.

The strikes aimed “to degrade Iran’s ability to continue attacking international commerce flowing through the international trade corridor,” the Centcom said.

Tehran’s reply came quickly, with the Guards saying they hit dozens of US military facilities in Kuwait and Bahrain, where an AFP journalist heard blasts.

Early on Wednesday, Bahrain’s interior ministry and the Kuwaiti army both reported their air defense systems were triggered, but did not give details of any damage.

Iran’s chief negotiator Mohammad Bagher Ghalibaf accused the United States of “major” breaches of their memorandum of understanding, including by reinstating oil sanctions and “violating Iranian adjustments in the strait.”

Washington revoked sanction waivers on Iranian oil sales, raising pressure on Tehran as it negotiates over a final settlement to the conflict.

The US Treasury Department canceled a license announced in June that had allowed Iran to produce, sell and deliver crude oil and related products through 21 August.