Six people were stabbed by the same suspected knifeman during a pub fight in Neasden.
Police were called to the large-scale disturbance outside McGowan's Pub, The Circle, Neasden, at 2.25am on Sunday (25) after reports of a man stabbing several people.
Detective Constable Stuart Outred, Brent police, said: "This is an appalling act of violence where the victims were assaulted.
"The pub was busy at the time of attack and there should be numerous witnesses.
"I urge anyone with any information to contact Brent CID."
Anyone with information is asked to call Brent CID on 020 8733 3159 or call Crimestoppers anonymously on 0800 555 111.
On Sunday (25) Ciobra Mihai, 32, of Monmouth Road, Lower Edmonton, was arrested and charged with affray and possession of a sharp pointed article in public place.