Tehran/washington, April 1 -- President Donald Trump expressed frustration Tuesday with allies who have been unwilling to do more to support the US war effort, telling them to "go get your own oil" as Iranian President Masoud Pezeshkian said his country had the "necessary will" to end the ongoing war, but was seeking guarantees that the conflict would not be repeated. "We possess the necessary will to end this conflict, provided that essential conditions are met -- especially the guarantees required to prevent repetition of the aggression," Pezeshkian said in a phone conversation with the president of the European Council, according to a statement from his office, reiterating a key demand of Tehran's. Israel's Prime Minister Benjamin Netanyahu in the evening said that the campaign against Tehran had "shaken the regime", but the war effort "was not over". Iran's Revolutionary Guards said that they will target US companies in the region in retaliation for attacks on Iran from Wednesday, listing 18 groups including Microsoft, Google, Apple, Intel, IBM, Tesla and Boeing. Earlier, US strikes hit the central city of Isfahan, sending a massive fireball into the sky, and Tehran attacked a fully loaded Kuwaiti oil tanker of Dubai in the Persian Gulf as the US Defense Secretary warned that the war was entering a decisive phase. The attacks showed the intensity of the war more than a month after the US and Israel launched it. The conflict has left more than 3,000 dead and caused major disruptions to the world's supply of oil and natural gas, roiling global markets and pushing up the cost of many basic goods. Trump, who has vacillated between insisting there is progress in diplomatic talks with Iran and threatening to widen the war, had earlier shared footage of the attack on Isfahan. Iran's foreign minister said he has been receiving direct messages from U.S. special envoy Steve Witkoff but they do not constitute "negotiations", Qatar's Al Jazeera TV cited him as saying on Tuesday. The messages include threats or exchanged views delivered through "friends", Abbas Araqchi added. Iran's stranglehold on the Strait of Hormuz, the waterway leading out of the Persian Gulf through which a fifth of the world's oil is transported during peacetime, has driven up global oil prices, as have Tehran's attacks on regional energy infrastructure. Spot prices of Brent crude, the international standard, hovered around $107 a barrel Tuesday, up more than 45% since the war started Feb. 28. US gasoline prices jumped past an average of $4 a gallon for the first time since 2022 . Trump directed blame at US allies like the United Kingdom and France that have refused to enter a war with no clear endgame that they were not consulted on. "You'll have to start learning how to fight for yourself, the U.S.A. won't be there to help you anymore, just like you weren't there for us. Iran has been, essentially, decimated. The hard part is done. Go get your own oil!" Trump wrote. He singled out France for not letting planes fly over French territory while taking military supplies to Israel. France has allowed the U.S. Air Force to use the Istres base in southern France because it had guarantees that planes landing there would not be involved in carrying out strikes. Spain, which has emerged as Europe's loudest critic of the war, said Monday that it had closed its airspace for U.S. planes involved in the conflict. Italy recently refused to allow U.S. military assets to use the Sigonella air base in Sicily for an operation linked to the offensive, an official with knowledge of the matter said, confirming a local press report. The official spoke on condition of anonymity because they were not authorized to speak publicly. Italy's Defense Minister Guido Crosetto wrote on X that Italy is still allowing the U.S. to use its bases, adding that there has been no cooling of relations between the two countries. In Iraq, the Interior Ministry said a foreign journalist was kidnapped in the country. Two Iraqi security officials said the kidnapped journalist was a woman with US citizenship....