Iran has halted oil tankers transiting the Strait of Hormuz, launched a drone strike on a key Saudi oil pipeline and demanded Israel cease its attacks on Lebanon as Donald Trump's ceasefire deal faced a furious backlash from his own allies. 

Two tankers were allowed through the Strait on Wednesday morning as the two-week ceasefire with the US took effect, Iran's semi-official Fars news agency reported.  

But the agency later reported that passage had been suspended, saying it was halted 'simultaneous with Israel's attacks on Lebanon.' 

Iran also threatened to destroy oil tankers if they try to travel through the Strait without permission, as the regime has imposed a toll of up to $2million per vessel.

Saudi Arabia's East-West oil pipeline, a critical artery routing crude from the Gulf to the Red Sea, came under drone attack at 1pm local time, the FT reported. 

Kuwait's air defenses intercepted 28 drones in sustained attacks targeting oil facilities, power plants and water desalination infrastructure from 8am Wednesday, the country's army said, adding that strikes were still ongoing. 

Trump is facing a furious backlash from his most fervent supporters over the ceasefire and ten-point peace plan, amid fears it concedes too much to Tehran - with even his own White House forced to clarify his claims about the terms of the deal. 

Republican Senator Lindsey Graham demanded JD Vance appear before Congress to explain the terms of the agreement after the dovish Vice President spearheaded 11th-hour peace talks mediated by Pakistan. 

'The supposed negotiating document, in my view, has some troubling aspects, but time will tell,' Graham posted on X. 

'I look forward to the architects of this proposal, the Vice President and others, coming forward to Congress and explaining how a negotiated deal meets our national security objectives in Iran.' 

Republican Representative Don Bacon of Nebraska said Trump had secured 'significant victories' but expressed skepticism over the peace talks and the President's claims of 'total victory.'

'The government's still in place and we should be negotiating from a position of strength, not a position that's good for them,' he told CNN.

'They will work with Russia and China as soon as they can to start rebuilding their military. And they will be a threat five, six, seven, eight years down the road. And so, as long as this government's in place, total victory has not been earned.'

Laura Loomer, a pro-Israel Trump ally, predicted the ceasefire 'will fail.'

'The negotiation is a negative for our country. We didn't really get anything out of it and the terrorists in Iran are celebrating,' she wrote on X. 'I don't know why people are acting like this is a win.'

Mark Levin, another pro-Israel commentator with close ties to Trump, said that while he trusts the President's 'instincts,' the Iranians could not be trusted.