The Missouri Gaming Commission has received 84 complaints about possibly illegal slot machines and other gaming devices that are spreading across the state.
The St. Louis Post-Dispatch reports the complaints have identified at least 200 potentially illegal machines in stores and fraternal organizations this year.
Gaming officials say the machines have diverted an estimated $50 million from the Missouri Lottery, and some business owners and casinos complain they are losing money to the machines.
The spread of unregulated video gaming machines will be the subject of an Oct. 10 public hearing at the Missouri Capitol.
A special House committee on gambling was formed to investigate whether to allow sports betting and video gambling, but the growth of unregulated gaming terminals has become the focus of the hearing.