One of Northern Ireland's leading bookmaking firms suspended betting on three Carnegie League matches on Saturday afternoon.
Sean Graham removed the Cliftonville v Armagh, Glenavon v Limavady and Larne v Portadown fixtures from their list.
"Only small bets were involved but there was a certain popular bet and we felt there was a risk with Irish football," said a spokesperson.
On Thursday the Irish FA announced an inquiry into alleged match fixing.
The investigation concerned Glenavon's 4-0 win over Armagh City with both clubs refuting the allegations.
"We have to be seen as a governing body to be taking matters like this very seriously," said IFA chief executive Howard Wells.
"We gather there is information out there that would be of interest to us."