An international manhunt is underway for Haoling Luo, whose wife's body was found stuffed inside a freezer in a Sydney apartment yesterday.

Mr Luo cleared customs at Sydney International Airport on Tuesday, the day before NSW Police made the lurid discovery.

Australian authorities are making urgent enquiries with officials in China as to the man's whereabouts.

It's believed the couple's two sons, aged four and six, were with Mr Luo when he left the country and that his wife's body had been in the freezer for several days.

Police are trying to track down the couple's children.

Police were called to a block of apartments on Bobbin Head Road at Pymble yesterday after a family friend called triple-0 with concerns for the woman's welfare.

Officers bashed down the door of the fourth-storey apartment after no one answered.

 

Inside, they found the woman, a Chinese national believed to be in her late thirties, inside a recently purchased freezer.

Neighbours said they heard yelling and screaming coming from the couple's apartment on Sunday night.

Homicide detectives spent the night interviewing neighbours and residents in the area to try and establish a motive for the alleged murder.

Investigators were working to obtain CCTV from the building, while forensic officers continued to dust the apartment for finger prints and gather bags of evidence.

Two cars were also towed from the apartment's car park last night.

More to come.