Police said they are not ruling out the possibility the murder of Thavisha Peiris was racially motivated, but said there was "nothing to suggest that's the case".
Detective Superintendent Lisa Ray told a press conference that the pizza worker was wearing a Domino's T-shirt, and said the 25-year-old still had some cash on his person when he died, though police can't yet be sure if anything was taken from the victim.
More top news
Police are looking for more than 30 men on suspicion of rape and of posting a video of the attack on social media.
Barack Obama laid a wreath for the victims of the Hiroshima atomic bombing of 1945 in the first presidential visit by the US.
The report says pensioners could lose thousands of pounds - but its findings are dismissed as 'outrageous' by a Leave campaigner.