Iran and its Lebanese terror proxy Hezbollah could attack Israel as early as Monday, Secretary of State Antony Blinken told his counterparts from the G7 countries on Sunday.

Three sources briefed on the conference call confirmed the top American diplomat’s remarks to Axios reporter Barak Ravid.

Blinken convened the meeting with the G7 allies – Canada, France, Germany, Italy, Japan and the United Kingdom – to coordinate ahead of the expected offensive by Iran and its terror proxies against the Jewish state.

He stressed that reducing the impact of the expected Iranian drone and missile strikes offered the best hope of preventing an all-out war, according to the report.

While Washington believes Iran and Hezbollah will retaliate against Israel for the targeted killings last week of senior Hezbollah member Fuad Shukr in Beirut and Hamas leader Ismail Haniyeh in Tehran, it is unclear regarding what form that retaliation will take, said Blinken.

Nor, he added, did Washington know the exact timing of the expected attack. However, he emphasised that it could start as soon as the next 24 to 48 hours, meaning as soon as Monday.

Washington was attempting to “break the escalatory cycle” by limiting the attacks by Iran and its proxies and also by restraining Israel’s response to them, said Blinken according to Axios.

“Blinken asked the other foreign ministers to apply diplomatic pressure on Iran, Hezbollah and Israel to maintain maximum restraint,” the report continued.

He also stressed to the G7 allies that the bolstering of US forces in the Middle East region was for defensive purposes only.

“We express our deep concern over the heightened level of tension in the Middle East which threatens to ignite a broader conflict in the region,” the G7 ministers said in a statement.

“We urge all involved parties to refrain from perpetuating the current destructive cycle of retaliatory violence, to lower tensions and engage constructively towards de-escalation. No country or nation stands to gain from further escalation in the Middle East,” it continues.

Gen. Erik Kurilla, commander of US Central Command (CENTCOM), arrived in the Middle East on Saturday for a previously planned trip the focus of which has now shifted to mobilising a multilateral defensive force to shield Israel.

Kurilla was expected in Israel on Monday. Israeli officials told Axios that Kurilla will meet with the Israel Defence Forces to finalise preparations ahead of the possible Iranian and Hezbollah attacks. He was also scheduled to visit the Gulf states and Jordan.

Biden to convene national security team

US President Joe Biden listens during a meeting with Israeli Prime Minister Benjamin Netanyahu (Photo: Getty)

President Joe Biden plans to convene his national security team in the situation room on Monday to discuss the developments in the Middle East, according to the White House.

The president will also speak with Jordan’s King Abdullah, the White House said. Amman played a pivotal role during Iran’s April 13 onslaught on Israel.

Jordanian Foreign Minister Ayman Safadi visited Tehran on Sunday to discuss the security situation. According to the Jordanian Foreign Ministry, Safadi met with acting Iranian Foreign Minister Ali Bagheri and passed along a message from King Abdullah II to the Iranian president.

“I didn’t come here to convey a message from Israel or to receive a message for Israel. I came here to express concern about regional escalation,” Axios quoted Safadi as saying after his meeting in Tehran.

Underscoring the regional tensions, the visit marks the first diplomatic trip to the Islamic Republic by a high-level Jordanian official since Safadi’s predecessor, Nasser Judeh, led a government delegation to Tehran in 2015.

Iranian officials have told Arab diplomats that Tehran is determined to strike Israel even if doing so sparks a regional war, The Wall Street Journal reported on Sunday.

Israeli Prime Minister Benjamin Netanyahu's US Congress speech was met with condemnation from Islamic State officials (Photo by ALLISON BAILEY/Middle East Images/AFP via Getty Images)

Israeli Prime Minister Benjamin Netanyahu convened the chiefs of Israel’s security agencies on Sunday evening for a situation assessment at the Kirya military headquarters in Tel Aviv, Channel 12 News reported, noting that the government is still creating a “definitive picture” of the assault it could be facing.

The report said that Israel’s defence establishment was considering the possibility of “preventive actions or attacks … in Lebanon or perhaps in other places where necessary.”

A source in Jerusalem told NBC News earlier on Sunday that the government is bracing for a combined attack by Iran and Hezbollah lasting “several days,” with missile attacks from the north and east.