Police were questioning a man tonight after another man was gunned down outside a fast-food restaurant.
Daniel Smith, 22, died outside a branch of KFC in Harrow Road, Paddington, north west London, in the early hours of May 22.
Investigators believe he may have been mistaken for a gang member or caught in the cross-fire between feuding groups.
A Metropolitan Police spokesman said a 23-year-old man was arrested on suspicion of murder earlier today.
Mr Smith, an electrician, lived with his mother and two sisters on the Mozart Estate. He died from a single gunshot wound.
Two 21-year-old men questioned in May have been released on bail until August pending further inquiries.
Anyone who has information or can assist police is asked to call 0208 733 4704 or Crimestoppers, anonymously, on 0800 555 111.