Three of the suspects, including principal mastermind suspect Hiroyuki Nagahama, have been arrested and detained, along with Reynante Labampa and Jovic Viscara. (RELATED: Jailer assures safety of Japanese murder suspect)
The targets of the manhunt include Sonny “Tatan” Anicete, head of the Commando Brotherhood based in Puerto Princesa City, a certain alias Bando, and an alias Jhun.
The victims, identified as Itani Masaru, 59, and Arai Yoshihiru, 24, were reportedly shot and killed in an island in Culion before their bodies were chopped up and thrown in small pieces to the sea, according to eyewitnesses.
The police are looking at insurance fraud as the motive behind the killing. (READ: Police looking at money, insurance claims as motive in Japanese murders)
Coron police chief Thirz Starky Timbancaya has told reporters they are looking at the possibility that the crime may be related to the activities of Japanese syndicates.
Palawan Provincial Police Director Col. Gabriel Lopez said this week they are collecting additional evidence to build up the case against the suspects.
“Hanggang ngayon, hinahanap pa din ang katawan ng tao at saka yung bangka na ginamit,” Lopez said.