A law expert says police should not be leading the removal of "court-siders" at the Cricket World Cup, as the practice is a contractual breach, but not illegal.
Court-siding is when people at matches relay information during games to others outside the venue, taking advantage of broadcasting time delays, to influence betting.
On Saturday, police said "several" people caught court-siding were interviewed and removed from Christchurch's Hagley Oval during a game.
But because the act was not illegal, AUT University senior law lecturer Craig Dickson questioned why police were involved.
He said although court-siding was a breach of the terms and conditions of ICC Cricket World Cup tickets, it was not breaking New Zealand laws.