Jeremy Corbyn has criticised Turkey and Saudi Arabia for their failure to tackle Isis in Syria and also questioned the effectiveness of France's bombing raid in Raqqa.

The Labour leader said Turkey’s bombing of Kurdish insurgents on the Syrian border had undermined efforts by the international coalition to target Isis targets operating in the region.

He also hit out at Saudi Arabia for allegedly supporting Isis with funds and said there were many questions over how Isis has acquired weapons and how it has been able to export oil.

Mr Corbyn said he first wanted to see the formation of an “acceptable government” in Syria, which can then take on Isis and reiterated his view that a political solution was the best route to defeating Isis.

“In the long run there has to be a much wider political settlement in the whole region and in the Middle East, otherwise we’re going to get more of this as time goes on," he told Sky News.

"At the end of the day, all wars have to end by a political discussion and political solution to it."

Asked whether he supported France’s decision to drop 20 bombs on Isis targets in Raqqa, the de facto 'capital' of Isis-controlled territory in Syria on Sunday night, Mr Corbyn said: “I don’t think that that bombing is necessarily going to bring about the solution that they believe it might.

“There’s going to be civilian casualties from the bombing of Raqqa,” he added.

“I think far more hopeful are the talks that took place in Vienna over the weekend, including Russia, the United States, European Union and of course the neighbouring countries.

“I think the solution actually lies in creating some kind of acceptable government in Syria that can in turn then hopefully deal with the problem with Isis, or Isil.”

In pictures: Fighting between Kurds and Isis intensifies in Kobani Show all 30 1 /30 In pictures: Fighting between Kurds and Isis intensifies in Kobani In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani An explosion rocks Syrian city of Kobani during a reported suicide car bomb attack by the militants of Isis group on a People's Protection Unit (YPG) position in the city center of Kobani, as seen from the outskirts of Suruc, on the Turkey-Syria border In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani An explosion rocks the Syrian city of Kobani during a reported suicide car bomb attack by Isis Getty In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani An explosion in the Syrian city of Kobani set off as fighting continues Getty Images In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Heavy smoke rises following an air strike by the US-led coalition aircraft in Kobani Getty Images In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani An unidentified armed man takes position near a building in the Syrian town of Kobani, as seen from near the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc in Sanliurfa province In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Kurdish fighters walk to their positions in Kobani In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Residents of Kobani walk in the streets of the besieged town, as seen from near the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc in Sanliurfa province In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani People's Protection Unit (YPG) fighters walk in the Syrian town of Kobani, as seen from near the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc in Sanliurfa province In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani People watch the Syrian town of Kobani from near the Mursitpinar border crossing, on the Turkish-Syrian border in the southeastern town of Suruc in Sanliurfa province In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani A Turkish soldier stands on a top of a tank as he watches the Syrian town of Kobani from near the Mursitpinar border crossing, on the Turkish-Syrian border in the southeastern town of Suruc in Sanliurfa province In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Smoke rises from the Syrian town of Kobani, seen from near the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc. Kurdish forces defending Kobani urged a U.S.-led coalition to escalate air strikes on Isis fighters who tightened their grip on the Syrian town at the border with Turkey. A group that monitors the Syrian civil war said the Kurdish forces faced inevitable defeat in Kobani if Turkey did not open its border to let through arms, something Ankara has appeared reluctant to do In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Newly arrived People's Protection Unit (YPG) fighters walk in a line in the Syrian town of Kobani, seen from near the Mursitpinar border crossing on the Turkish-Syrian border In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Heavy smoke rises from the Syrian town of Kobani, seen from near the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc in Sanliurfa province In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Kurdish women mourn at the grave of a relative, who was a Kurdish fighter killed in fighting with the militants of the Islamic State group in Kobani, and was buried at a cemetery in Suruc In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Turkish army tanks mechanized units take position on top of a hill near Mursitpinar border crossing in the southeastern Turkish town of Suruc in Sanliurfa province In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Smoke rises after an US-led air strike in the Syrian town of Kobani. The air strikes pushed Isis fighters back to the edges of the Syrian Kurdish border town of Kobani, which they had appeared set to seize after a three-week assault, local officials said In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani A huge plume of smoke rises after an airstrike in eastern Kobani, Syria, behind a hilltop where militants with the Islamic State group had raised their flag on Monday AP In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Turkish Kurds watch as airstrikes hit Kobani AP In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Smoke rises from the Syrian town of Kobani as Turkish army tanks take position on the Turkish side of the border Reuters In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Military aircraft flies over the Turkey-Syria border as it nears targets in Kobani In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Smoke rises after a US-led air strike in the Syrian town of Kobani Reuters In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Turkish Kurds, on the Turkey-Syria border, watch over the border at the intensified fighting between Isis and Kurdish forces AP In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Smoke rises during airstrikes on the Syrian town of Ain al-Arab, known as Kobani by the Kurds Getty In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani A huge plume of smoke rises after an airstrike outside west Kobani, Syria AP In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani A militant with the Isis group walks in the town of Kobani In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Militants with the Isis group, bottom, along with a machine gun-fitted pick up truck, partially seen bottom right, hold positions in Kobani, during intensified fighting with Syrian Kurds In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani People watch smoke rising from the Syrian town of Ain al-Arab, known as Kobani by the Kurds, after an air strike Getty In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Smoke rises from a strike at an area of a mosque that destroyed its minaret, in Kobani during heavy fighting between militants with the Isis group and Syrian Kurds In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani Militants with Isis hold positions in Kobani, Syria, during intensified fighting with Syrian Kurds AP In pictures: Fighting between Kurds and Isis intensifies in Kobani Kobani A partial view of Kobani with a mosque's minaret

The Turkish President Recep Tayyip Erdogan told fellow world leaders at the G20 summit in Turkey that the “time for talking is over” and said there must be collective action against “terrorism”.

However, Turkey has included the Syrian Kurdish paramilitary group the People’s Protection Units (YPG) in its bombing campaign, which has undermined coalition air strikes against Isis.

The YPG is among the United States’ closes military ally on the ground in its fight against Isis in Syria.