Police are asking any witnesses, or anyone who may have information about the attack on the 13-year-old girl to contact them. The victim was raped at around 9pm on Saturday, 30 November.
Anyone with information is asked to call Crimestoppers anonymously on 0800 555 111.
More top news
The 34-year-old from Coulsdon in Surrey died during the private party in Headley in the early hours of Monday, Surrey Police said.
The Home Office made the arrests at various restaurants across London on July 4.
Mayor of Newham Sir Robin Wales criticised the International Olympic Committee on the fourth anniversary of the opening ceremony.