Police are examining antisemitic tweets posted after an Arsenal-Spurs clash that saw winger Theo Walcott and St John Ambulance staff pelted with missiles.
Scotland Yard confirmed it is assessing the messages that referred to the Holocaust and is liaising with both clubs over the objects that were thrown.
A spokesman said: "We're aware of antisemitic messages posted on Twitter following Arsenal v Tottenham on Saturday 4 January – an assessment is under way."
Walcott was apparently pelted with coins as he was stretchered off after injuring his knee during the north London derby.
The incident is being looked at as part of Operation Arrowtip, which focuses on football-related crime.
A Scotland Yard spokesman said: "The Metropolitan police service is aware of incidents during the Arsenal v Tottenham Hotspur match on Saturday 4 January, where a number of objects were thrown from home and away sections of the crowd.
"The MPS takes all such incidents seriously. Officers from Operation Arrowtip are investigating and are liaising with both clubs and the Football Association over these incidents."
The FA confirmed that it has contacted Arsenal and Tottenham Hotspur over the missile-throwing and said it will back the harshest punishments possible, including life-long bans.
http://www.theguardian.com/football/2014/jan/07/police-antisemitic-tweets-coins-thrown-spurs-arsenal-match