Police have made two more arrests after promising teenage footballer was stabbed to death after being chased through a west London estate.
Abdullahi Tarabi, 19, collapsed in an alleyway after being knifed in the stomach in broad daylight near his home in Northolt at about 3.30pm on Tuesday.
Witnesses described how the teenager cried for help before he was dragged to the safety of a nearby house in Newnham Close.
Paramedics battled to save Mr Tarabi but he was pronounced dead just after 5.30pm.
Schoolmates from the Alec Reed Academy in Northolt, formerly known as the West London Academy, described the young man as a talented footballer “with a lot of potential”.
A post-mortem examination held at Uxbridge Mortuary on Thursday confirmed that he died as a result of a stab wound to the abdomen.
Three 19-year-old men and an 18-year-old man who were initially arrested on suspicion of attempted murder and later arrested on suspicion of murder have been released on bail while police investigate.
Two further arrests have been made. A 16-year-old boy was arrested in Harrow on Thursday and a 17-year-old boy was arrested on Friday at a north London police station.
They were both arrested on suspicion of murder and are currently in custody at north London police stations, police said.
Detectives from the Homicide and Major Crime Command, led by Detective Chief Inspector Andy Partridge, are investigating.
DCI Partridge said: "This deplorable attack took place in broad daylight in a residential location.
"I would like to hear from anyone who saw the attack itself or witnessed anything else that may be important.
"Whilst arrests have been made and we have had a good initial response from the public, I am still keen to trace further witnesses who can assist with the investigation."
Anyone who witnessed the incident or has information about the attack is asked to contact the incident room on 020 8358 0300 or via Twitter @MetCC.
Alternatively Crimestoppers can be contacted anonymously on 0800 555 111 or online at the crimestoppers-uk.org website.