Tributes have been paid to a 20-year-old man believed to have been stabbed to death in Deptford last night.

England footballer Jadon Sancho, 19, led tributes online to the man identified locally by his stage name "Bis" - a drill rapper and member of the Harlem Spartans group, based in Kennington.

The Borussia Dortmund winger tweeted: "Rest up bis," with a picture of the victim, who detectives are confident is Crosslom Davis, 20.

He was pronounced dead just after 3.30am on Friday, about 12 and a half hours after Exauce Ngimbi, 22, was killed in an unrelated attack in Hackney, east London.

Mr Ngimbi was pronounced dead shortly after 2.30pm Thursday, after an altercation with a group, Scotland Yard said.

A third man, 26, was knifed to death in a suspected robbery near Harrods in Knightsbridge, west London, as he made his way home from a restaurant just after midnight.

He was found unconscious with a stab wound to the back and was pronounced dead at the scene. He has not been formally identified but his family have been told.

Another man, who was with the victim, was also knifed in the attack, which is believed to have been carried out by two males, who detectives believe were trying to steal from them.

He remains in hospital, where his injuries are described as not life-threatening.

Chief Inspector Andy Partridge said: "It appears that the victims were going home having just attended a nearby restaurant.

"They were approached by two males on Basil Street, at the junction with Pavillion Road. It was here that the two male suspects confronted the victims.

"Although at an early stage, we believe that the victims were approached in order to steal property from them and were attacked during that encounter.

"We retain an open mind concerning the motive for the attack and are pursuing a number of lines of inquiry at a pace.

"I urge anyone who has information concerning this incident to contact my team who are waiting to speak with you. All information will be treated in the strictest confidence."

The luxury department store was open on Friday, while a crime scene remained in place.

Police vehicles were parked at either end of taped-off Hans Crescent, with a white evidence tent erected in the middle of the street running down the side of the shop.

Scotland Yard has arrested three men, one aged 23 and two aged 26, and a 14-year-old boy, over the murder of Mr Ngimbi.

Detective Chief Inspector Paul Considine said: "Exauce's family are devastated but I want to assure them, and the wider public, that we will work tirelessly to ensure those responsible for this murder face justice."

Detective Chief Inspector John Massey, who is leading the investigation into Mr Davis's death, said: "While we tirelessly work to piece together the events that sadly led to a young man losing his life, I would appeal to those who have information to do the right thing and speak to us.

"If you saw anything out of the ordinary, no matter how insignificant you think it is, then please contact my team as a matter of urgency, as your information could prove vital to our inquiries and could help bring those responsible for this heinous violent act to justice."