Two Japanese criminal suspects in Cambodia could soon be facing justice on home turf. Sources say authorities plan to have them deported and arrested in Japan on charges of fraud.

The men are accused of running a bogus investment scheme from a hotel in Cambodia's north. The area has in recent years become known for hotels and casinos.

The sources say Cambodian investigators detained a group of seven Japanese men after a tipoff around May. All are in their 30s to 50s.

Three have no passports. Sources say it's possible they have been working for someone else, who could have taken their travel documents away.

The sources say two of the suspects are accused of convincing a man in Saga Prefecture, southwestern Japan, to invest in a fictitious deal. Japanese police plan to visit Cambodia and escort them back home.

A similar case arose in April, when authorities in Cambodia detained 19 Japanese nationals. They are accused of running a fraud scheme from a resort.

One expert suggests the southeast Asian nation has become a hotbed for globetrotting crime groups.

Phil Robertson of Human Rights Watch says, "Well what we're seeing is that Cambodia is descending into a criminal state. The impunity to scam people, has been paved by a lot of Chinese gangs. They are by far away the largest ones that are using the cyber scamming and human trafficking elements there, in Cambodia, but now Japan is following as well."

Robertson also points to corruption among local police and public servants.

And he believes Japan has a role to play in turning the situation around.

Robertson says, " There needs to be a concerted international effort then Japan should help lead this to demand accountability and to end the criminal gang activities in Cambodia. The international community not only in Southeast Asia but across the world should say to Cambodia 'Enough is enough!'"