The CEO of Ontario Lottery and Gaming -- an organization facing a number of investigations over lottery fraud -- has resigned, CTV News has learned.

Duncan Brown's resignation papers were to be finalized on Friday or on the weekend, CTV's Paul Bliss reported.

Brown has been steering the OLG through some turbulent waters after allegations of fraud by lotto retailers.

Ontario Ombudsman Andre Marin is investigating allegations that retailers were winning far too many large prizes over the last seven years.

Marin's report is being tabled Monday and is expected to be critical of the lottery corporation.

"The timing of the CEO's resignation is no coincidence, but there is already speculation Brown is being made the fall guy to deflect criticism of the government," Bliss said.

Brown, a well-respected lotto expert, has worked in the industry since the 1970s. He earned about $360,000 last year.

Just 10 days ago, OLG pulled more than 1 million of its most popular scratch tickets from stores.

"Super Bingo" was ordered removed from the province's 10,000 retailers after a player complained that winners could be picked without having to scratch the ticket.

With a report from CTV's Paul Bliss