The autopsy results on two Chinese farmers found dead near an airport on Saipan in the Northern Marianas confirm they were murdered.
51-year-old Hai Ren Li, suffered a skull fracture due to blunt force and 47 year old Cheng You Li received multiple lacerations and wounds.
The CNMI Public Safety Commissioner James Deleon Guerrero says police have a person who is cooperating with investigators and the three recent double homicides all involving Chinese nationals are now being treated as a single investigation.
The bodies of couple Guo Huang Xu and Qing Xiu Zheng were killed in an arson on their house in February this year.
Two years ago another Chinese couple, Jun Li Yang and Jing Liu, were found murdered inside their home in San Vicente.