A 36-year-old man has been arrested in connection with the murder of a 28-year-old in west London.
Jaabe Roberts was stabbed in Shepherd's Bush in the early hours last Wednesday.
A Metropolitan Police spokesman said a man had been arrested in Battersea, south London on Tuesday afternoon.
Meanwhile a 34-year-old man who was arrested at a caravan park in West Sussex on Monday was released no further action to be taken.
Two further people have been given police bail over the murder, while two others have been released without charge.
Mr Roberts suffered a stab wound to the heart and died in hospital shortly after the attack.