Police investigators will be sent to Bangkok to bring the bodies of two slain Japanese back by the end of this month for autopsies, according to investigation sources.
The Metropolitan Police Department will also launch a full-fledged investigation into the slayings of Yoshio Kojima, 53, and Tatsuya Hisakane, 52, in cooperation with Thai police, the sources said.
The bodies are currently being kept by the Thai police.
George Fernandase, a 64-year-old Malaysian man, has been arrested in Thailand in connection with the case.
The two bodies were found at a construction site in Pathum Thani Province near Bangkok on March 28. Both had a bullet hole in the neck, and one also had several more in other parts of the body, according to the Thai police.
According to Japanese investigations, the two entered Thailand on March 7.