“We must anticipate, plan for the ‘day after’, and the stabilisation of Mosul after the military battle,” Ayrault said Tuesday, adding that Iran, despite its influence in the region, was not invited to the talks.

The French foreign minister said the international coalition fighting IS also had a “responsibility” to retake Raqa, in Syria, which would be the last major city in either country under the group’s control if Mosul falls.

“Not to go on to Raqa would be a bad mistake,” Ayrault told reporters, adding: “If we want to fight effectively against terrorism it is essential to take this city.”

The long-awaited offensive on Mosul was launched on Monday, with some 30,000 forces involved in Iraq’s largest military operation since the 2011 pullout of US troops.

The US military, which is leading a coalition providing air and ground support, said Iraqi forces looked “ahead of schedule” but warned the battle would be long and difficult.

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