Police investigating a double early hours stabbing in north-west London have again released this CCTV image of their suspect.
Both attacks occurred within an hour of each other in Kilburn High Road on April 9.
This is the second attempt to identify the suspect after the first appeal was unsuccessful.
This is the second attempt to identify the suspect after the first appeal was unsuccessful.
Police were initially called at 1.19am after a 63 year-old man was stabbed in the back near the junction with Victoria Road.
Officers and the London Ambulance Service (LAS) attended and he was taken to a central London hospital for treatment before being discharged.
At around 2.35am police were called to the stabbing of a 39 year-old man further along Kilburn High Road close to Cambridge Avenue.
Officers and LAS attended and found the man suffering a stab wound to the abdomen.
He was taken to a central London hospital - his condition was deemed not life-threatening.
Detective Constable Thomas Ryan, from North West Area's CID, said: "Following a thorough investigation, including analysis of CCTV, we are confident that the attacks that occurred in the early hours of Tuesday, 9 April are linked.
"We are releasing an image again of a man we want to trace and speak to - do you recognise him? If so, please get in contact with us without delay.
"Following the two incidents, we increased our presence in and around the Kilburn High Road area as a precaution.
“At this time, we are not aware of any further, linked offences, however, we need to identify and apprehend the person responsible for these attacks so I would ask anyone who has information that could assist this investigation, or who recognises this person, to contact us now.”
No arrests have been made at this time. Enquiries continue.
Anyone who has information is asked to call North West area CID on 101 quoting CAD 386/09APR or tweet @MetCC.