Detectives investigating the murder of 43-year-old Menelaos Aligizakis at a bus stop in Waterloo Road have issued a new appeal for witnesses and information.
Officers are especially keen to hear from passengers on a route 139 bus that pulled up at a southbound bus stop in Waterloo Road at about 2.45am on Saturday 3 January.
Police were called around that time to a northbound bus stop outside Waterloo Station to reports of an assault.
Menelaos Aligizakis – aged 43 and originally from Athens, Greece – was pronounced dead at the scene.
A post-mortem examination on Sunday gave the cause of death as blunt force trauma to the head.
"My condolences are with the family of Mr Aligizakis at this very difficult time," said Detective Chief Inspector Will Reynolds.
"We have previously said this is a very busy part of London frequented by both commuters and those on a night out.
"We are keen to hear from people who were in the area or passing by at the time of this incident who may have seen or heard something that could help our investigation.
"A number of witnesses have already come forward and we are grateful to them for doing so.
"However, there was a route 139 bus that pulled up on the opposite side of the road to where the attack took place at about 2.45am.
"A number of passengers are known to have left the bus at this point. I am appealing to those passengers in particular to contact police."
Anyone with information is urged call the incident room on 020 8721 4205 or Crimestoppers anonymously on 0800 555 111 or via www.crimestoppers-uk.org