Qatari mediators have presented Iran with a new draft deal to end the war with the US and Israel, an official briefed on the negotiations said, but a senior Iranian official said Doha had only put forward unacceptable ideas that did not amount to an offer.

The official briefed on the negotiations, who is not from Iran, said a new draft peace proposal for the eight-month-old conflict was presented on Sunday and was being considered by Tehran, with a response expected by the end of the week.

Qatar, along with Pakistan, has led mediation to end the war, which has disrupted global shipping and oil supplies and recently spread to Saudi Arabia and Yemen.

The proposal presented by Qatar sets a seven-day timeline addressing both Tehran’s and Washington’s concerns, laying out daily confidence-building steps that each side must take, the official briefed on the negotiations said. The timeline could begin early next week and several countries would act as guarantors of the deal, the official added.

Shortly afterwards, a senior Iranian official involved in the talks said Qatar had presented only “unacceptable ideas and not an offer”, and that Tehran’s policy on showing no flexibility over the nuclear issue remained unchanged.

Iran’s Foreign Minister Abbas Araqchi said on Wednesday that Tehran remained in close contact with intermediaries to review ideas that could ensure the implementation of its own seven-day proposal aimed at ending the war in the Middle East.

He said Iran continued to give diplomacy a chance to succeed, adding that Tehran’s seven-day plan could be implemented in less than a week.

Washington wants Iran’s decades-long nuclear programme to be part of negotiations to end the war from the outset, while Iran says its conditions — which include an end to the US blockade of Iranian ports and the lifting of sanctions on Iranian oil exports — must be met first. Iran rejects Western concerns ​that ⁠its nuclear programme is military in nature.

In late September, Iran presented its seven-day proposal under which Araqchi said the Strait of Hormuz, one of the world’s most important energy shipping channels, could be reopened if certain conditions were met. US President Donald Trump rejected it, prompting further Qatari mediation.

The draft discussed in Tehran on Sunday was different from that proposal, the official briefed on the negotiations said, though the details of the latest plan were not immediately clear. The official had previously told Reuters that the Qatari mediators had coordinated with Washington before going to Tehran.

Earlier mediation efforts to end the war that the US and Israel launched on February 28 helped produce an interim peace agreement in June, but it quickly unravelled.

In recent weeks, Yemen’s Iran-aligned Houthi forces have launched repeated attacks against Saudi Arabia — a key US ally and the world’s largest crude exporter — opening a new front in the eight-month-old war.

Oil prices LCOc1 rose more than 1% to more than $115 per barrel on Wednesday after a Houthi attack on Saudi Arabia’s largest oil refinery, Ras Tanura, stoking concerns over supply risks.

Fighting with the Houthis intensified last month as the militant group advanced against Saudi-backed forces towards the Bab el-Mandeb Strait, another important shipping lane on the other side of the Arabian Peninsula from Hormuz.

The official briefed on the negotiations said there were concerns ahead of Sunday’s meeting in Tehran that Israeli Prime Minister Benjamin Netanyahu, fighting for another term in a general election, could resume attacks on the Islamic Republic this week.

On Friday, Trump repeated threats to strike Iran again, while Iranian security officials told Reuters Tehran had drawn up detailed plans to attack Gulf undersea cables if the US and Israel resumed attacks.

On Monday, top officials from Saudi Arabia, Turkey and Pakistan also met Iranian officials in Tehran as part of de-escalation efforts. Qatar said on Tuesday that Iran needs to stop threats against Arab Gulf states and open the Strait of Hormuz to show good intentions for mediation efforts to succeed.

Gulf states came under sustained bombardment earlier in the war.

The war also reignited fighting between Israel and the Iran-backed Lebanese armed group Hezbollah. It has eroded Trump’s approval ratings ahead of the US midterm elections that decide control of Congress.

The US has informed several Gulf nations it may launch a “brief but intense” military operation against Iran after the midterm elections on November 3, the Wall Street Journal reported on Wednesday.

According to the newspaper the warnings were passed on through diplomatic and military channels.

Its sources said Washington and Israel are preparing for a fresh wave of attacks intended to weaken Iran and pressure it back to negotiations.

President Donald Trump has not made a final decision, though the Journal reported that he is seriously considering extensive operations after the elections, with Iranian infrastructure and nuclear facilities among the possible targets.

The US military is reportedly moving an additional Patriot missile defence system from Texas to Israel to help counter any Iranian retaliation.

The newspaper said the movement was identified from flight tracking data and confirmed by two officials familiar with the weaponry.

US personnel are also being withdrawn from bases in the Middle East considered vulnerable to Iranian attack.

Ammunition stocks are being built up, and plans are being made for the possible use of fighter and bomber aircraft.

There are already 20 warships near the Persian Gulf, and an additional aircraft carrier strike group and a Marine expeditionary unit are expected to arrive.

The war is in its eighth month, and by mid-October its cost was estimated at $47.1 billion, a figure that does not include damage to US military installations in the Middle East.

About $29 billion of the total, almost 60 per cent, has gone on munitions, including Tomahawk and Patriot missiles.

Qatari mediators presented Iran with a new draft deal on Sunday to end the war with the US and Israel, and Tehran is expected to send a response to the draft by the end of the week, an official briefed on the negotiations said on Wednesday.

The new draft being considered by Iran sets a seven-day timeline addressing both Tehran’s and Washington’s concerns, laying out daily confidence-building steps that each side must take, the official said.

The timeline could begin early next week and several countries would act as guarantors of the deal, the official added.

Qatar, along with Pakistan, has led mediation to end the war that the US and Israel launched in February. The conflict has disrupted global shipping and oil supplies and spilled over across other parts of the Middle East.

There were concerns ahead of Sunday’s meeting in Tehran that Israeli Prime Minister Benjamin Netanyahu, fighting for another term in a general election, could resume attacks on the Islamic Republic this week, the official briefed on the negotiations said.

On Friday, US President Donald Trump repeated threats to strike Iran again, while Iranian security officials told Reuters Tehran had drawn up detailed plans to attack Gulf undersea cables if the US and Israel resumed attacks.

Earlier mediation ​efforts helped produce an interim peace agreement in June, but the deal quickly unravelled.

In recent weeks Yemen’s Iran-aligned Houthis have launched repeated attacks against Saudi Arabia, the world’s largest crude exporter