A second man has been arrested over the fatal shooting of a former British heavyweight boxer during a row over smoking, police said.
James Oyebola asked customers to stop smoking
James Oyebola, 47, was shot at the back of Chateau 6 in Fulham Road, south-west London, early on 23 July, after asking customers to put out their cigarettes.
He died in hospital on 26 July after his life support was switched off.
The 22-year-old was arrested in Putney, south-west London, on Tuesday and was taken to a west London police station.
Another man, 19, who was arrested last week over the shooting, was bailed to return mid-August pending further inquiries, police said.
Mr Oyebola was shot in the head and leg.
Officers from Operation Trident, which deals with gun violence within the black community, have searched three addresses in the Wandsworth area in connection with the shooting and appealed witnesses to come forward.
They said the ex-boxer was shot after asking three men to stop smoking in a covered courtyard area at the back of the bar, on the Fulham Road.
They believe three black suspects, aged between 19 and 25, ran from the club in separate directions.
Mr Oyebola, who was born in Nigeria, won 18 of his 23 fights and was a bronze medallist at the 1986 Commonwealth Games in Edinburgh.
He won the WBC international heavyweight title in 1993 and retired in 1996.