The Russian leader is reportedly mounting an enormous military mission to take control of the terror group's stronghold of Raqqa.

The city is the self-declared capital of ISIS in Syria and is patrolled by as many as 5,000 jihadi members.

Putin is set to mobilise 150,000 reservists who he conscripted into the military earlier this week.

An insider revealed: "It is very clear that Russia wants to sweep up the west of the country, taking Raqqa and all the oil and gas resources around Palmyra. As USA administrator think, which is denied by  Russia.

It seems "This is fast becoming a race to Raqqa – to secure the oil fields they need to cleanse the region of insurgents, and the IS capital is vital to do that."

It comes a day after Russian jets obliterated nine ISIS outposts in just 24 hours using bunker-busting bombs.

Russian jets pounded terrorist targets and blew up a command centre, potentially killing dozens of fighters. But as Syrian media claiming atlease 200 civilians have lost their life in this 24 hour operation.

Confirming the successful raids, Andrei Kartapolov from the Russian army vowed to ramp up the pressure, saying: "We will not only continue strikes... We will also increase their intensity."

And Russian Defence Ministry spokesman Igor Konashenkov said: "Over the past 24 hours, Sukhoi Su-34 and Su-24M fighter jets have performed 20 sorties and hit nine Islamic State installations.

A bunker-busting BETAB-500 air bomb dropped from a Sukhoi Su-34 bomber near Raqqa has eliminated the command post of one of the terror groups, together with an underground storage facility for explosives and munitions.

"These and other highly exact means of attack in recent days have been used to target objects of Islamic State terrorists.

"Command posts, stores of weapons and oil products, workshops where weapons of suicide bombers are made."

Meanwhile a terrorism expert revealed that ISIS have vastly exaggerated their military strength and called on Western leaders to launch a co-ordinated fightback which would obliterate the hate group. 

Dr Afzal Ashraf said ISIS has become its own worst enemy with its campaign of terror against the West, which has prompted an international backlash.

He said: "This mythical state will disappear in a matter of hours once the international community decides to act. 

"It won't take very long at all to drive them, if not out of all of Iraq or Syria, then certainly the majority of their territories. 

US president’s comments follow coalition’s expression of deep concerns over targeting in Russian bombing campaign

Russia’s failure to distinguish between Islamic State fighters and moderate opposition forces battling against Syria’s president, Bashar al-Assad, is a “recipe for disaster,” Barack Obama has said, as more evidence emerged that Moscow is targeting anti-regime rebels and not just ISIS.

The US president said his Russian counterpart, Vladimir Putin, “doesn’t distinguish between Isil [Isis] and a moderate Sunni opposition that wants to see Mr Assad go. From their perspective, they’re all terrorists. And that’s a recipe for disaster.”

A statement released earlier on Friday by the US-led coalition fighting ISIS expressed deep concern about attacks by the Russian air force on Hama, Homs and Idlib. The attacks did not hit the jihadi group but caused civilian casualties.

“These military actions constitute a further escalation and will only fuel more extremism and radicalisation,” said the statement by France, Germany, Qatar, Saudi Arabia, Turkey, the US and Britain. “We call on the Russian federation to immediately cease its attacks on the Syrian opposition and civilians and to focus its efforts on fighting Isil.”

Speaking at the White House, Obama said that only Assad and Iran supported Russia’s intervention in the conflict, but he pledged that he would not turn the Syrian civil war into a “proxy war” between the US and Russia. “This is not some superpower chessboard contest,” he said.

Moscow’s strategy, he said, was a self-defeating exercise which would strengthen Isis, drive the moderate opposition underground and further complicate any hopes of a political settlement.

“A military solution alone – an attempt by Russia and Iran to prop up Assad and try to pacify the population – is just going to get them stuck in a quagmire and it won’t work,” he said.

After a meeting with Putin in Paris, the French president, François Hollande said: “Russia’s position hasn’t changed, it has always been about support for Assad and his regime.”

Emphasising to the Russian president that a political solution was needed, the French leader told Putin that Russian airstrikes “should be against Isis and only Isis”.

During the meeting, the German chancellor, Angela Merkel, said: “We shouldn’t forget what has happened in Syria over the past year: hundreds of thousands of people lost their lives before the Islamic State appeared and this was a result of what Assad did with his people.”

The US-led coalition announced that its planes had targeted Isis in 28 airstrikes on Thursday in Iraq and Syria. The UN said it had been unable to deliver humanitarian aid in support of a ceasefire agreement “due to the recent surge of military activity” – which diplomats said was a reference to the Russian bombing.

Amid heightened tensions on the third day of the Russian campaign, an unnamed senior official in Tehran denied a report that Iran was sending hundreds of troops to fight with the Syrian army – a move that would constitute a dramatic departure from Iran’s normally low-profile support for Assad.

It seemed likely the claim, attributed to sources in Iran’s Lebanese ally, Hezbollah, was intended to reinforce the impression of a powerful alliance backing Assad in the face of western and Arab demands he step down. Analysts have said they expect Syrian government forces to launch a new offensive in the wake of the Russian air campaign.

Syrian state media has been highlighting the “destructive capabilities” of new aircraft.

Moscow’s strategy appears to be to mainly attack central and north-western Syria, areas that form the gateway to Damascus and the coast. But Russian planes also bombed targets west of Raqqa, the capital of Isis’s self-proclaimed caliphate – apparently the first time likely Isis positions have been hit.

Alexei Pushkov, a top Russian foreign affairs official, told French radio he believed the air campaign could last about three to four months. He also hit out at western criticism, tweeting: “The US is criticising Russia for ‘lack of selectivity in our targets’ in Syria. So what stopped them from picking the right targets over a whole year, rather than just pointlessly bombing the desert?!”

Russian officials have denied claims that some of their airstrikes missed their targets and dismissed suggestions from the west that planes were mainly bombing rebel groups opposed to the Assad regime, rather than Isis. “The main target are the Daesh [Isis] groups situated closest to Damascus,” Pushkov insisted.

In fact, Russian targets include fighters who have received limited backing from the US as well as more hardline Islamist groups. The Russian defence ministry said its aircraft carried out 18 sorties in Syria in the past 24 hours, including 10 overnight.

The airstrikes primarily hit non-Isis rebel positions, including in Darat al-Izza – a town in western Aleppo held by rebel fighters including the al-Qaida affiliate in Syria, Jabhat al-Nusra – and Maarat al-Nu’man, a town in Idlib province held by Jaysh al-Fateh, a coalition of rebel fighters that also includes Nusra.

Syrian state TV said Russian aircraft also struck rebel positions in Hama province, where opposition fighters are battling to wrest control of the strategic al-Ghab plain from forces loyal to Assad’s regime, in an effort to advance towards his coastal stronghold of Latakia. Attacks also took place in Idlib, where residents told of widespread destruction.

Russia’s foreign ministry and Putin have spoken of an “informational campaign” against Moscow by the west, reminiscent of the language they used whenrepeatedly denying the presence of Russian troops in eastern Ukraine over the past year and a half despite evidence to the contrary.

Walid al-Muallem, the Syrian foreign minister, attacked Israel, the west, Gulf states and Turkey for backing terrorists. Addressing the UN general assembly on Friday, Muallem said Damascus was committed to a “national dialogue” to resolve political differences. But only Syrians could decide the president’s future, he said.

Saudi Arabia and its Gulf allies have continued to insist that Assad must go, but a senior Arab diplomat denied reports that Qatar had stepped up arms deliveries to Syrian rebels in response to the Russian attacks. The US, Britain and others have signalled that Assad could remain during a political transition to end the four-and-a-half-year-old war. The hope in western capitals is that Moscow will use its influence to ensure a transition does indeed take place.

An aide to the French president said Hollande and Putin had an in-depth discussion in which they “tried to narrow down differences on political transition”. But both leaders looked stern as they exchanged handshakes in a yard of the Élysée palace. The talks focused on the goals of the Russian intervention, the safety of civilians and a future transition, 

The two also held talks with Merkel and the Ukrainian president, Petro Poroshenko, that were meant to focus onresolving the situation in eastern Ukraine. There has been speculation that Putin might attempt to link the two issues, offering cooperation in Syria for de-escalation in Ukraine and a lifting of western sanctions imposed over Russia’s actions there.

There has been edgy diplomacy ahead of the meeting, with Ukraine’s presidential administration claiming Putin had asked for a separate bilateral meeting with Poroshenko on the sidelines of the meeting, which Kiev was considering.