Tottenham and Arsenal have called on fans from both clubs to be proactive in stamping out offensive chanting which marred Sunday's north London derby at White Hart Lane.
Spurs' 2-1 victory over their bitter local rivals was overshadowed by abusive jeers from both the home and away stands. Arsenal manager Arsene Wenger was taunted, while some sections of the travelling supporters mocked the deadly gun attack on the Togo team bus in January 2010, which Emmanuel Adebayor survived. Spurs boss Harry Redknapp blasted the chants as "disgusting".
Tottenham confirmed several fans from both the home and away sections of the crowd were ejected from White Hart Lane during the game.
In line with the club's zero-tolerance policy on abusive chanting, they have also promised to ban any guilty party for life.
Arsenal, meanwhile, intend to work closely with their counterparts across north London to root out the offenders.
Spurs have taken steps to stamp out abusive chanting in recent times.
The club have extensive CCTV coverage of all stands and have displayed posters and stickers at White Hart Lane urging fans to report any offensive chanting.