The Cameroonian Football Association president was in attendance at Brazil's 4-1 victory over South Korea last night at the 974 Stadium.

In a trending video captured by Naijacrawl, the 41-year-old became animated after exchanging words with a man holding a camera.

A clearly fired up Eto'o walked down the camera man, before being initially held back by four other onlookers.

While the man with the camera, who appeared to be a YouTuber with more than 60,000 subscribers, was being led away - he stopped to crouch down, just as Eto'o shook off those trying to calm him.

In a shocking scene, the former Chelsea frontman ran up to the YouTuber, appearing to knee him full in the head.

Despite the force of the blow, the man managed to quickly rise to his feet, with Eto'o being led away from the scene.

After the incident it emerged that it may have been sparked by an argument regarding Cameroon's qualification for the World Cup.