"The fact is we're not going to have Iran have a nuclear weapon," he said as he left the White House for a weekend at the Camp David presidential retreat. "And when they agree to that, they are going to have a wealthy country, they're going to be so happy and I'm going to be their best friend." Loading "I hope that happens. I hope that happens, but it may not," Trump said. He later said Iran will be hit with unspecified new sanctions on Monday. Iran said on Saturday it would respond firmly to any threat against it. "America is the real terrorist in the world by spreading chaos in countries, giving advanced weapons to terrorist groups, causing insecurity, and still it says 'Come, let's negotiate'," the parliament's deputy speaker, Masoud Pezeshkian, said at the start of a session broadcast live on state radio.

"Death to America," chanted many lawmakers. The chants, often repeated since the 1979 Islamic revolution which toppled the US-backed Shah, came weeks after Trump said in a US television interview: "They [Iranians] haven't screamed 'death to America' lately." Trump's more optimistic rhetoric came as it emerged that US military cyber forces launched a strike against Iranian military computer systems on Thursday in response to the loss of the military drone. US officials told journalists that the cyber attacks, which disabled Iranian computer systems that controlled its rocket and missile launchers, had been authorised by Trump. Head of the Revolutionary Guard's aerospace division General Amir Ali Hajizadeh points at the wreckage of US drone RQ-4A in Tehran. Credit:EPA On Saturday, days after he said it was "hard to believe" the shoot-down of the US drone was intentional, Trump did an about-face and accused Iran of "knowingly" targeting the plane. And he reiterated that he aborted a planned military strike set for Thursday after learning approximately 150 Iranians would be killed.

"Everybody was saying I'm a war monger. And now they say I'm a dove. And I think I'm neither, if you want to know the truth," Trump told reporters. "I'm a man with common sense. And that's what we need in this country, is common sense. But I didn't like the idea of them knowingly shooting down an unmanned drone and then we kill 150 people." Loading He added: "I don't want to kill 150 Iranians. I don't want to kill 150 of anything or anybody unless it's absolutely necessary."' Trump's comments came as Iran summoned the United Arab Emirates' top envoy to Tehran to protest the neighbouring Arab nation's decision to allow the US to use one of its military bases to launch the drone that Iran says entered its airspace, state media reported Saturday. Iran issued a "strong protest" to the UAE diplomat, saying Iran does not tolerate the facilitation of foreign forces that violate its territory, the report by the official IRNA news agency said.

The US said its RQ-4A Global Hawk was shot down Thursday over international waters in the Strait of Hormuz, not inside Iranian airspace. The shoot-down by elite Iranian Revolutionary Guard forces marked the first time the Islamic Republic directly attacked the American military amid mounting tensions over Tehran's unravelling nuclear deal with world powers. Loading The two countries disputed the circumstances leading up to an Iranian surface-to-air missile bringing down the drone, an unmanned aircraft with a wingspan larger than a Boeing 737 jetliner and costing over $144 million. British diplomat Andrew Murrison planned to visit Iran on Sunday to call for the "urgent de-escalation in the region and raise UK and international concerns about Iran's regional conduct" during talks with Tehran's government, Britain's Foreign Office said in a statement Saturday.