U.S. President Donald Trump has said Washington "did send a copy" of its accord with Iran to end the Middle East war, following reports of tensions with Prime Minister Benjamin Netanyahu.

Insisting he maintains a good relationship with Netanyahu, Trump reaffirmed his criticism at the G7 summit of Israel's campaign against Hezbollah in Lebanon, saying "they (Israel) could do a much better job".

The Israeli military announced Thursday that one of its soldiers had been killed in fighting in southern Lebanon the day before, in an incident that also wounded seven soldiers.

Master Sergeant Alexander Filin, 29, "fell in combat", the military said in a brief statement, adding that an officer, a reserve officer and a reserve soldier were moderately injured.

Hezbollah chief Sheikh Naim Qassem on Wednesday hailed an understanding reached between Tehran and Washington to end the regional war as a "great victory", calling it a "pivotal point" for Lebanon.

Although the U.S.-Iran deal to end the Middle East war has not been officially released, American and Iranian officials, as well as mediator Pakistan, have said it includes Lebanon.

An Iranian official on Wednesday said the funeral procession for late supreme leader Ayatollah Ali Khamenei, who was killed by U.S.-Israeli strikes in February, will pass through Iraq before his burial in Iran.

U.S. President Donald Trump said Wednesday he expected the accord with Iran ending the Middle East war to be signed "shortly" but cast uncertainty over the exact date.

Tehran's foreign ministry on Wednesday said it was considering a plan for the presidents of the U.S. and Iran to sign the deal ending the Middle East war, ahead of the expected ceremony in Switzerland.

U.S. President Donald Trump on Wednesday warned Iran he was ready to resume military action if Tehran did not abide by its obligations, two days ahead of the signing of an accord to end the war between the foes.

"If they (the Iranian side) don't behave, we'll go right back to dropping bombs right smack in the middle of their head," Trump said at the G7 summit alongside Egyptian President Abdel Fattah al-Sisi.

Gravediggers in a southern Lebanon village prepare tombs for the dead in Israeli strikes during the latest Israel-Hezbollah war, near those killed in the previous conflicts between the foes.

In front of recent graves bearing three huge portraits in Deir Qanoun al-Nahr, Shourouk Hariri, 32, wept for her twin brother and volunteer rescuer Ahmad, one of his colleagues, and her uncle, a local civilian.

Moscow supports a deal between the United States and Iran to end the Middle East war, Russian Foreign Minister Sergei Lavrov told his Iranian counterpart during a phone call on Wednesday, insisting that Israel must also comply.

"The Russian minister expressed support for the understandings reached through effective mediation by Pakistan and Qatar to de-escalate tensions in the region. The importance of compliance by all parties involved in the armed conflict, including Israel, was emphasized," the Russian foreign ministry said in a read-out of the call.

Iran's military threatened on Tuesday to respond to Israel after strikes in southern Lebanon killed four people despite a deal between Tehran and Washington ending the Middle East war, including in Lebanon.

"If the child-killing army of the Zionist regime does not put an end to its acts of aggression in southern Lebanon, it should await a harsh response from the powerful armed forces of the Islamic Republic of Iran," said the Iranian military's central command Khatam al-Anbiya.