A third arrest has been made as police have identified the 21-year-old man stabbed to death in a north-west London shopping centre.
Metropolitan Police officers were called to Brent Cross Shopping Centre at 6.45pm on Tuesday following reports of a group of males fighting.
The force have said Gedeon Ngwendema, 21, was the victim found stabbed at the scene, before he died a short while later, despite the efforts of officers, members of the public and ambulance staff.
A post-mortem examination was carried out on Wednesday at Northwick Park Mortuary and found the cause of death to have been a single stab wound.
Police have said a 20-year-old man was arrested on suspicion of murder at his home in Harrow, on Wednesday.
It comes after an 18-year-old man was arrested on suspicion of murder and another male, aged 22, was arrested on suspicion of murder and affray on Tuesday.
All three men are in custody.
A crime scene remains in place at the shopping centre, and police have warned the public to expect to see an increased presence of officers in the area.
Detective Chief Inspector Linda Bradley, leading the investigation, said: “We are directly appealing for information from anyone who may have witnessed the incident and is able to help us with our investigation.
“We are especially urging anyone with footage of the incident or the aftermath to get in touch with us immediately.
“There was a significant number of people nearby when this tragic incident happened and I am confident that there are people out there who are yet to come forward.
“No matter how insignificant the information may seem to you, please contact the police as soon as possible.
“As you can imagine, Gedeon’s family are experiencing unimaginable grief and we want to bring answers and justice to them as quickly as we can.
“This is a complex investigation and we appreciate the local community’s support and understanding while we continue to conduct our inquiries.”