Police have released CCTV images of the person suspected of the attempted murder of a wealthy Russian banker.
German Gorbuntsov was shot a number of times as he entered his block of flats near Canary Wharf, east London on 20 March.
Scotland Yard is liaising with Russian police for the first time on a major criminal inquiry since the diplomatic fallout over the death of dissident Alexander Litvinenko.
The suspect, described as white, 6ft and slim, was wearing a dark hooded top and was seen running from Byng Street away from Westferry Road, towards Marsh Wall.
Detectives discovered a gun, hooded top and bag near the scene.
Detective Chief Inspector Russell Taylor, leading the investigation for the Metropolitan Police, said: "We are continuing to examine CCTV footage from the area and are keen to speak with anyone who may have information about the shooting.
"Were you in Byng Street or nearby, shortly before or after 7.20pm on Tuesday 20 March? Did you see anyone acting suspiciously in the area?
"Did you see the man in the CCTV stills taking off a dark hooded top or leaving a bag?"
Gorbuntsov, 45, remains in a stable condition in hospital. No arrests have been made.