Iranian President Hassan Rouhani has declared the end of Isis in an address broadcast live on state TV.

A senior commander of Iran’s Revolutionary Guards, Major General Qassem Soleimani, also declared the end of the jihadist group operating in Syria and Iraq in a message published on Tuesday on Sepah News, the Guards' news site.

The Revolutionary Guards' statement also thanked its ally, Lebanese militant group Hezbollah, for its "decisive" role in the fight.

Saudi Arabia has 'declared war' on Lebanon and detained Lebanese PM, says Hezbollah leader

Iranian militias have helped shore up Syrian President Bashar al-Assad's rule since 2014 against both moderate opposition and extremists in the civil war. At least 1,000 Iranian fighters, some of them Afghan refugee recruits, are thought to have died in the fighting.

Across the border in Iraq, Iranian-funded Shia militias form part of the US-backed Iraqi coalition which drove Isis out of its de facto Iraqi capital of Mosul in June and has almost succeeded in eliminating Isis as a land-holding force in the country.

In a televised speech from Beirut on Monday night, Hezbollah leader Hassan Nasrallah said that the group was ready to withdraw its troops from Iraq once the central government declares a decisive victory.

The situation in Yemen Show all 14 1 /14 The situation in Yemen The situation in Yemen Houthi supporters trample on a US flag during a gathering mobilizing more fighters into several Yemeni battlefronts, in Sana'a, Yemen EPA The situation in Yemen People carry the coffins of men, who were killed in the recent Saudi-led airstrikes during their funeral, in the Old City of Sanaa, Yemen AP The situation in Yemen Pro-government fighters give food to Yemeni children on the road leading to the southwestern port city of Mokha. Yemeni rebels are putting up fierce resistance in a key Red Sea port city where they are encircled by pro-government force Getty Images The situation in Yemen A Yemeni stands in front of a graffiti protesting US military operations in war-affected Yemen, in Sana'a, Yemen. According to reports, US Special Forces troops allegedly disembarked from US helicopters in the Yemeni town of Yakla and attacked several houses belonging to members of the terrorist group Al-Qaeda, killing three high-ranking Al-Qaeda members and nine civilians, six women and three children. One American serviceman has been killed and three injured in the attack EPA The situation in Yemen US Special Forces troops allegedly disembarked from US helicopters in the Yemeni town of Yakla and attacked several houses belonging to members of the terrorist group Al-Qaeda, killing three high-ranking Al-Qaeda members and nine civilians, six women and three children. One American serviceman has been killed and three injured in the attack EPA The situation in Yemen A Yemeni female fighter supporting the Shiite Huthi rebels, and carrying weapons used for ceremonial purposes, takes part in an anti-Saudi rally in the capital Sanaa Getty Images The situation in Yemen Yemeni female fighters supporting the Shiite Huthi rebels, and carrying weapons used for ceremonial purposes, take part in an anti-Saudi rally in the capital Sanaa Getty Images The situation in Yemen A boy shouts slogans next to pro-Houthi fighters, who have been injured during recent fighting, during a rally held to honour those injured or maimed while fighting in Houthi ranks in Sanaa, Yemen Reuters The situation in Yemen Balls of fire and smoke rise from a Houthi-held military camp following alleged Saudi-led airstrikes, in Sana'a, Yemen EPA The situation in Yemen Yemenis search under the rubble of damaged houses following reported Saudi-led coalition air strikes on the outskirts of the Yemeni capital Sanaa Getty Images The situation in Yemen A Yemeni boy looks on as Yemenis search under the rubble of damaged houses following reported Saudi-led coalition air strikes on the outskirts of the Yemeni capital Sanaa Getty The situation in Yemen A Yemeni boy sits amidst the rubble of damaged houses following reported Saudi-led coalition air strikes on the outskirts of the Yemeni capital Sanaa AFP/Getty The situation in Yemen Marine One with US President Donald Trump flies with a decoy and support helicopters to Dover Air Force Base in Dover, Delaware, for the dignified transfer of Navy Seal Chief Petty Officer William 'Ryan' Owens who was killed in Yemen Getty Images The situation in Yemen US President Donald Trump aboard the Marine One to greet the remains of a US military commando killed during a raid on the al Qaeda militant group in southern Yemen on Sunday, at Dover Air Force Base, Delaware, US Reuters

Both Rouhani and Nasrallah's comments come in the wake of an Arab League meeting in Cairo on Sunday in which Saudi Arabia called on the region to unite against Iran, its regional rival, over its "destabilising" role in the Middle East's many conflicts.

Tensions between Riyadh and Tehran are running high following a 4 November Houthi rebel ballistic missile fired from Yemen towards Saudi Arabia and the shock resignation of Lebanon's Sunni Prime Minister Saad Hariri, a move widely believed to have been orchestrated by the Saudi authorities.

President Rouhani said that the Houthis had launched the attack in response to "so much bombing" by the Saudi-led Arab coalition propping up Yemen's exiled government. He also called the regional organisation "old, worn-out, exhausted and ineffective."