Several people were turfed out of the opening match of the Cricket World Cup today for trying to manipulate the betting.
Police confirmed a number of spectators from Christchurch's Hagley Oval, including some who were caught "courtsiding".
Courtsiding is when fans within venues relay information about incidents during games to people overseas immediately, taking advantage of broadcasting time delays to influence betting.
Police warn anyone caught trying this at the Cricket World Cup will be banned from all grounds involved in the tournament.
Superintendent Sandy Manderson, operation commander for the tournament, said police could identify people who were courtsiding.