Tokyo police have arrested 15 Japanese men over fraud as they were being flown back to Japan from Thailand. Thai police had detained them in March on suspicion of working illegally in the country.
The group of men aged from 22 to 54 left Suvarnabhumi Airport near Bangkok on Friday morning. They covered their faces and did not respond to reporters' questions.
Shortly after leaving Thailand, Japanese investigators arrested three of the suspects on a flight to Narita Airport, and the remaining 12 on a plane flying to Haneda Airport.
The men are suspected of swindling a resident of Fukui City in central Japan. Japanese police say the woman paid about 2,700 dollars after being told that she owed money for accessing a website.
Japanese investigators allege that the group, based in the resort city of Pattaya, swindled some 640,000 dollars from about 80 people between January and March.
They say they plan to uncover the full details of the group's activities and to find out who was directing them from Japan.