Watch: Kickboxing bout descends into chaos

All hell broke lose at a kickboxing championship over the weekend after spectators entered the ring to attack one of the fighters following a controversial KO.

Armenian Harut Grigorian was fighting Dutch athlete Murthel Groenhart at the Glory 42 Kickboxing Championship event in Paris.

At the start of round two, Grigorian appeared to turn towards his corner with his gloves down after a knee to the head from Groenhart.

Groenhart took immediate advantage, striking his opponent with a right handed punch to the jaw, while stood behind Grigorian.

The Armenian collapsed, knocked clean out, and Groenhart immediately went to the ropes to celebrate - a move which infuriated some members of the crowd.

Several fans, seemingly supporters of Grigorian, entered the ring and attacked Groenhart, throwing punches and causing the Dutchman to defend himself from the unexpected onslaught.

However it was a fair shot within the rules of the sport - the referee had made no intervention - and Groenhart was declared the winner.

- By Matthew Smith of the Daily Mail