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| Double murder probe CCTV released | Double murder probe CCTV released |
| (9 minutes later) | |
| CCTV images showing the last known movements of a woman, who was murdered along with her boyfriend at a flat, have been released by police. | CCTV images showing the last known movements of a woman, who was murdered along with her boyfriend at a flat, have been released by police. |
| Xi Zhou and Zhen Xing Yang, both 25, died after a "frenzied" knife attack in a flat in Newcastle's West End. | Xi Zhou and Zhen Xing Yang, both 25, died after a "frenzied" knife attack in a flat in Newcastle's West End. |
| The images show Miss Xi on a bus and walking towards the home she shared with Mr Zhen in Croydon Road. | The images show Miss Xi on a bus and walking towards the home she shared with Mr Zhen in Croydon Road. |
| Detectives have now also brought in an offender profiler to help establish a motive for the killings. | Detectives have now also brought in an offender profiler to help establish a motive for the killings. |
| The bodies of the victims, from China, were found at the downstairs flat on Saturday afternoon. | The bodies of the victims, from China, were found at the downstairs flat on Saturday afternoon. |
| Xi Zhou and her boyfriend Zhen Xing Yang studied at Newcastle University | Xi Zhou and her boyfriend Zhen Xing Yang studied at Newcastle University |
| The CCTV images were taken as Miss Xi travelled home from work at the Wagamama restaurant in Newcastle on Thursday afternoon. | The CCTV images were taken as Miss Xi travelled home from work at the Wagamama restaurant in Newcastle on Thursday afternoon. |
| Police said Mr Zhen was "assaulted for more than an hour" before being stabbed. They believe passers-by may have heard his screams. | Police said Mr Zhen was "assaulted for more than an hour" before being stabbed. They believe passers-by may have heard his screams. |
| A post-mortem examination revealed he suffered extensive bruising to his arms before he died. | A post-mortem examination revealed he suffered extensive bruising to his arms before he died. |
| Examinations also showed Miss Xi may have been asphyxiated as well as stabbed during the attack. | Examinations also showed Miss Xi may have been asphyxiated as well as stabbed during the attack. |
| A cat's body, found hidden under a sink in the flat, could also provide clues into the motive behind the murders, detectives have said. | A cat's body, found hidden under a sink in the flat, could also provide clues into the motive behind the murders, detectives have said. |
| The cat, which was found submerged under water in a washing bowl, was possibly killed by the pair's attackers, said Northumbria Police. | The cat, which was found submerged under water in a washing bowl, was possibly killed by the pair's attackers, said Northumbria Police. |
| The couple met at Newcastle University where they both took masters degrees, graduating in September 2006. | |
| Since then Miss Xi, known as Cici, had worked as a waitress at the Wagamama restaurant. | |
| Police have not yet established Mr Zhen's occupation, despite looking at the couple's bank accounts. | |
| They have ruled out any gang or drugs links, and said the murders remained motiveless. |