Four French airstrikes have killed dozens of fighters from the Islamic State group in a contested area of northern Iraq.

French president Francois Hollande said Rafale fighter jets struck a logistics depot in north eastern Iraq and the target was "entirely destroyed".

The airstrikes were France's first in Iraq after Mr Hollande agreed to bolster Iraq's fight against IS fighters

The US has also carried out airstrikes against the extremist group.

An Iraq military spokesman said four French airstrikes hit the town of Zumar, killing dozens of extremist fighters.

Zumar and surrounding towns have remained heavily contested by Islamic State fighters, even though Iraqi and Kurdish security forces have managed to make headway in nearby regions with the support of US airstrikes.

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