Thirteen other charges are laid as part of the race-fixing scandal

Police have brought 13 more charges in connection with an unprecedented police investigation into harnessing and breed fixing cases.

A police spokeswoman confirmed Thursday that the police had laid 12 other charges on some of the 13 accused and another on the racing sector.

The charges all relate to the alleged fixation of races. The defendants will then appear in the Christchurch District Court on December 5.

"The interrogation of the exhibits and other related investigations are ongoing," the spokeswoman said.

The 17-month-long Operation Inca investigation resulted in searches of 17 properties in Canterbury, Manawatū and Invercargill in early September.

The investigation, which involved so-called harness theft, corruption and drugs in sport, was unprecedented in New Zealand, police said at the time.

The harness racing is worth about $ 220 million a year and receives about $ 40 million from the New Zealand Racing Board. According to industry reports, about 11,000 people would own horses trained in harness racing.

Detective Superintendent Tim Anderson said that at the time of the arrests, the police did not yet know how much money could have been stuck in allegedly fixed errands.