At least 10 soldiers from the Cameroonian army’s elite Rapid Intervention Battalion were reportedly killed in an ambush on Thursday in Bamessing, in the troubled North-West region.
A video posted on social media showed naked bodies of soldiers on the ground and two armoured vehicles that had been set on fire.
A separatist group is said to have claimed the attack.
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The conflict has already killed more than 4,000 people and displaced tens of thousands others, according to the International Crisis Group.