Police investigating the murder of a man near a bus stop have been probing the missing hour before he met his death.
Vitalijs Janovics, 38, was stabbed to death in a five-minute period just after 1am on Friday morning.
He had used a cash dispenser an hour earlier, just yards from the bus stop near Bermondsey Underground station in south-east London where he was attacked. The waiter, who had left work in Leicester Square, central London, four hours earlier, withdrew £100 from the machine, but no money was missing from his body.
Detective Chief Inspector Amanda Hargreaves, leading the inquiry, said at the scene in Jamaica Road on Saturday: "We know he went into a shop but apart from that don't know what happened in that hour. We would also like to know what else he was doing earlier that evening after leaving work.
"He was caught on CCTV walking towards the bus stop at 1.05am. He showed a man at the bus stop that he had been stabbed, and collapsed. He would have collapsed within 30 seconds to a minute of getting the injury.
"Police were called at 1.10 so he would have been stabbed in that five-minute period but we have no idea why he was attacked. He had taken £100 out of the cashpoint near Bermondsey station at eight minutes past midnight but no money was missing from the body."
Mr Janovics, of Long Lane, Borough, south-east London - about a mile and a half away - was taken by ambulance to a south London hospital, where he was pronounced dead shortly after arrival. A post-mortem examination at Greenwich Mortuary gave the cause of death as a single stab wound to the heart.
Ms Hargreaves added: "We would like to hear from anyone who was in and around the area of Bermondsey Tube station at the time. Specifically, we would like to hear from two groups of potential witnesses. The first is three white men, who are believed to have been sitting on steps behind and near to the bus stop where Mr Janovics died. The second is a group of approximately 11 people who got off the last Tube train at Bermondsey station at around 1am.
"Also we would like to hear from any of Mr Janovics' friends and colleagues who could help us get a picture of what he may have been doing on Thursday night into Friday morning prior to his death."
Anyone who can help the police is asked to call the incident room on 020 8721 4155 or Crimestoppers anonymously on 0800 555 111.