A Singaporean man arrested for alleged involvement in the Forex-3D online Ponzi scheme has denied all charges, while his Italian-Thai model wife faces a charge of illegally sheltering the suspect.

After questioning, they were allowed to go home. The DSI had summonsed the couple and two leading players in the Forex-3D scam to hear charges on Thursday.

The Forex-3D case is one of Thailand's largest Ponzi schemes, with total losses in billions of baht. Lawsuits have been filed against 22 individuals and two corporate entities.