Police believe that a pregnant Chinese woman who disappeared nearly six years ago was murdered.
Li Hau Cao, who is also known as Li or Lisa Ekiareb, was last seen at the end of October 2006 when she was four months pregnant.
Although she lived in London with her husband, she was not reported missing to police until February 2007 when her family in China became increasingly concerned as to her whereabouts.
Li, who left China in 2002, had been working as a waitress and dancer in Dublin until June 2006. She is then known to have moved with her husband to Hampstead, NW3, and was thought to be working as waitress or a dancer in the Chinatown area.
Following continued efforts to trace her, investigating officers now believe she was murdered after the last known contact with her family in October 2006.
Police are keen to piece together her final movements and are appealing for anyone with information to contact them.
Li was born in 1979, and was 27 years old when she went missing. She was 5ft 4 inches tall, of small build and had long shoulder length black hair.
Acting Detective Chief Inspector Andrew Manning, of the Homicide and Serious Crime Command (HSCC), said: "Despite continued efforts to trace Li, we now believe her disappearance to be suspicious and we are conducting a full murder investigation. Following several lines of enquiry we believe that Li died on or shortly after 23rd October 2006. Li's family in China has been desperate for news for many years and we appeal to anyone who can assist with information about the case to come forward."
Anyone who can help should call the Incident Room at Hendon on 020 8358 0300, or to remain anonymous, call Crimestoppers on 0800 555 111.