Two men have been arrested on suspicion of inciting racial hatred after anti-semitic messages were posted on Twitter following Tottenham Hotspur's defeat to West Ham in October.
Scotland Yard said the men, aged 24 and 22, were arrested at their homes in Croydon and Wiltshire in connection with the tweets, which made reference to Hitler and gas chambers.
Last year, a minority of West Ham fans chanted: "Adolf Hitler, he's coming for you" during their 3-1 loss at Spurs.
It is the third arrest in the investigation into messages posted after the match, which West Ham won 3-0, on 6 October.
Both men have been bailed to a date in late January pending further inquiries. A 48-year-old man arrested earlier this month in Canning Town, east London, has also been bailed to next month.
Police warned fans before the Premier League match not to use the word ''yid'' and said supporters who did so could be committing a crime.
West Ham told supporters anyone caught behaving in a racist, anti-semitic or homophobic way would be punished to the full extent of the law.