Police investigating the fatal stabbing of a teenager outside a halls of residence in Acton are renewing their appeal to speak to a man in connection with the murder.
Khalid Safi suffered the injuries in a fight in Victoria Road, near the University of the Arts halls, on December 18 2016.
Officers are keen to speak to Raza Khan, but are warning anyone who recognises the 19-year-old to contact police immediately and not approach him.
They believe Khan is likely to be in the UK, and is known to have links to several areas in London including Acton, Wembley, Ilford, Friern Barnet and Tottenham, as well as also to Dover, in Kent.
Mr Safi was found with stab wounds following an altercation at around 6.30pm.
The teenager, who was living in Southwark at the time of his death, was taken to a west London hospital by London Ambulance Service but died a short time later.
The cause of death was a stab wound to the heart according to a post-mortem which was carried out the following day.
Detective Chief Inspector Sam Price, who is leading the investigation for the Homicide and Major Crime Command, said: “We are continuing our appeal for information about this fatal stabbing.
“We believe that some witnesses to the fatal stabbing or the moments leading up to it have not yet come forward and we would urge them to make contact with police as soon as possible.
“We are particularly keen to trace Raza Khan who we believe has crucial information about what happened to Khalid.”
Two people have been arrested in connection with the murder.
A 19-year-old woman arrested on December 7 was charged on August 16 with conspiracy to commit GBH.
A 22-year-old man who was arrested on March 29 on suspicion of assisting an offender has been released with no action.
Anyone with information is asked to call the police incident room on 020 8721 4054.
To give information anonymously contact Crimestoppers on 0800 555 111 or visit the website.
Keep up to date with the latest news from around the county via the free Get West London app.
You can set up your app to see all the latest news and events from your area, plus receive push notifications for breaking news.