Three thugs believed to have beaten a homeless man to death may have assaulted two other men shortly before, police said.
Gary Turner suffered head and abdominal injuries
Gary Turner, 43, was attacked in the early hours of 9 September in the Grove in Stratford, east London.
About 45 minutes earlier, detectives believe the same gang set upon two men at a nearby bus stop in The Broadway.
Police are looking for two white men and one black man, all aged in their late teens early twenties.
Mr Turner suffered head and abdominal injuries and was pronounced dead at the scene.
He had been sleeping rough, but was due to move into a flat two days later.
Officers have traced one of the men, assaulted at the number 25 bus stop outside a Wilkinsons Store, but still need to contact the other victim.
Det Ch Insp Carl Mehta said: "I believe that these two incidents may be linked.
"This is a busy thoroughfare and people would have been on their way to work that morning - they might have seen the incident outside Wilkinsons Store."