A professional basketball coach is expected to be summoned for questioning over allegations of game rigging, state prosecutors said Monday.

Prosecutors in Uijeongbu, north of Seoul, said they already arrested one person for carrying out illegal activities and plan in the near future to summon a coach suspected of playing a leading role in the game-rigging scheme.

No names were given, but investigators claimed the coach received 30 million won ($27,500) for fixing a game that occurred roughly two years ago.

Prosecutors said that the team's players were unaware of their coach's unlawful actions, which effectively affected the outcome of the game.

They said depending on what the coach has to say, the investigation may be expanded.

If the latest allegations prove to be true, it will mean that all four profession sports that are popular in South Korea have been tainted by game rigging, dealing another blow to South Korea's sporting world.

In 2011, the country's top professional football league, then called the K-League, was embroiled in a massive match-fixing scandal. Dozens of former and active players were indicted or convicted for their roles. The case forced the league to overhaul its structure to discourage further rigging attempts, and it has adopted a new name, the K League Classic, along with a new logo to recast its image.

Last year, two active players in the Korea Baseball Organization (KBO), the highest baseball league, received suspended jail terms for their roles in "spot fixing." That refers to an activity where particular plays within a game are fixed.

Spot fixing is considered more difficult to detect than match-fixing attempts, since fixed plays are often seemingly inconsequential plays with little impact on the outcome of the game.

The players were said to have taken money from gambling brokers in exchange for deliberately issuing first-inning walks.

Also in 2012, several volleyball players were implicated in a match-fixing scandal, leading to lifetime bans.

If the fixing allegations against the basketball coach are proven true, he will become the first active professional sports coach to engage in fixing. (Yonhap News)