US President Donald Trump said on Monday the Tuesday deadline he has set for Iran to make a deal is final and unlikely to be extended, calling Iran's peace proposal significant but not good enough.
Trump has warned US forces will unleash broad attacks on Iranian infrastructure if his Tuesday night deadline for a deal is not met.
"They made a proposal, and it's a significant proposal. It's a significant step. It's not good enough," Trump told reporters during an Easter egg event for children on the White House South Lawn.
Critics have said Trump would be committing war crimes if the US attacked civilian power plants, a point that Trump dismissed on Monday.
"I'm not worried about it. You know what's a war crime? Having a nuclear weapon," Trump said.
Trump said the five-week conflict could end quickly if Iran does "what they have to do".
"They have to do certain things. They know that, they've been negotiating I think in good faith," he said.
Trump, who had extended his initial deadline, gave no indication he would do so again.
"Highly unlikely. They've had plenty of time. In fact, they asked for seven days. I said, I'm going to give you 10," he said.
Trump's senior aides have been negotiating with Iran indirectly through Pakistan, attempting to get a deal in which Iran will forswear nuclear weapons and reopen the Strait of Hormuz, the oil transit waterway. Iran said it wanted a permanent end to the war, not just a temporary ceasefire.
Trump said it appeared the latest team representing the Iranian government is "not as radicalised" as others who have been killed in airstrikes.
He said if it were up to him, the United States would take control of Iran's oil, but he said the American people would probably not understand such a move.
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