Notts County are cooperating with police after a Magpies supporter was alleged to have abused one of Barnet's players.
The incident occurred in front of the Kop shortly before half-time as the Bees prepared to take a corner during the Magpies' 6-1 win.
Barnet's players spoke to referee Matthew Dicicco as the game was delayed temporarily and the official also addressed Notts head coach Ian Burchnall and his opposite number Dean Brennan.