Chinese authorities have confirmed they are speaking to a man linked to the death of a Chinese woman found in a freezer in an Upper North Shore Sydney unit.
Police discovered the body of the woman - believed to be in her 30s - after they entered the Pymble unit on Wednesday morning.
Multiple media outlets have named the woman as Renxi Ouyang.
Emergency services had been called to the unit on Bobbin Head Road about 10am on Wednesday after a friend became concerned for her welfare.
The woman has not yet been formally identified.
"At this stage we don't have any motive, we don't have a cause of death. We'll explore that as we explore the identity of the victim, the identity of those involved," Detective Superintendent Scott Cook told reporters on Thursday.
"We've also engaged with the AFP's liaison officer in Beijing and with the Chinese ministry for public security and Chinese consulate in Australia, and we're getting exceptional assistance from all those agencies."
Sources say the woman's husband - named by multiple media outlets as Haoling Luo - is also a Chinese national and has left the country with the couple's two children.
Police on Thursday confirmed a 36-year-old man and two boys, aged four and six, left Sydney on a China-bound flight about 11:30am on Tuesday.
The children are safe and Chinese authorities in the southwestern Sichuan province have spoken with the man.
"What's unusual in this case is the transnational nature of it. We're seeing this more and more with matters we investigate, perhaps a reflection on the use of travel and integration of communities," Det Supt Cook said.
A post-mortem examination will be conducted next week to determine the cause and time of death.
Det Supt Cook said he expected additional feedback from his Chinese counterparts later on Thursday.
Police are appealing for anyone with additional information to come forward.
