'They aren't gangs. They're clans linked by caste and they fight over honour': Inside the murky world of Kabaddi, the sinister way the sport is thriving in Britain - and the violent rivalries that saw a man hacked to death with a machete

Today a Daily Mail investigation reveals that the Alvaston carnage was far from an isolated incident and more and more meetings around the sport are now affected by violence and intimidation.