Detectives investigating the murder of a man in Canning Town are appealing for information about a vehicle they believe was involved in the offence.
The black Mercedes CLK 220, vehicle reg: KJ06CCZ, was seen on the A406 near to the A12 at approximately 14:25hrs on Sunday 2 April.
Ahmed Deen-Jah, 21, was attacked and murdered in Freemasons Road, at the junction with Coolfin Road, around an hour later.
The car was found burnt out in Warren Road, E11 at around 23:30hrs that evening.
Detective Chief Inspector Gary Holmes of the Homicide and Major Crime Command leads the investigation. He said: "The movements of this car form a vital part of this investigation and we need to work out its whereabouts from when it was spotted shortly before 2:30pm on 2 April and when it was discovered burnt out later that night.
"If you remember seeing this car in between those timeframes, or have any information that could assist the investigation, I would urge you to call police."
The investigation was launched after police were called on Sunday, 2 April shortly before 15:30hrs to a report of a stabbing at an off-licence on Freemasons Road, E16.
Officers attended along with the London Ambulance Service and found a 21-year-old man inside the shop suffering from stab injuries. He was pronounced dead at the scene at 15:40hrs.
A post-mortem examination held at East Ham Mortuary on Tuesday, 4 April gave cause of death as a stab wound to the heart. Next of kin have been informed.
The victim has been formally identified as Ahmed Deen-Jah of Canning Town.
Five people have been arrested on suspicion of Ahmed's murder; all have been bailed pending further enquiries to dates in May.
On 2 April, two 21-year-old men [A and B] and a 20-year-old man [C] were arrested on suspicion of murder.
On 4 April a 19-year-old man [D] was arrested on suspicion of murder.
On 10 April a 19-year-old man [E] was arrested on suspicion of murder.
Detectives from the Met's Homicide and Major Crime Command are investigating.
DCI Holmes, said: "This was a particularly brutal attack on a young man. We are still trying to establish the circumstances behind this incident, and we are continuing to appeal to anybody who was in the Freemasons area at around the time of the attack, or who lives nearby and may have seen or heard something, to come forward and speak to officers or Crimestoppers as soon as possible."
Any witnesses or anyone with information should contact the incident room number 020 8345 1570.
Information can also be reported anonymously to Crimestoppers on 0800 555 111 or via the www.crimestoppers.org.uk website.