Two of the persons in question live in England, while the other is a foreigner living in Sri Lanka.
One of the trio is reportedly building a big hotel in Galle.
Previously, the FCID investigated a complaint that Kusal Janith Perera had been reached to fix a match in the home series against West Indies in October-November 2015.
Perera, the then team manager Jeryl Woutersz, captain Anjelo Mathews and Rangana Herath were questioned over the matter.