West Midlands police are investigating allegations of racial abuse on social media that followed Birmingham's FA Cup third-round victory over Blackburn on Saturday.
Birmingham scored a late winner to secure a 2-1 win over their Championship rivals at St Andrew's.
On Monday police confirmed they were looking into complaints over alleged racial abuse on social media.
A police statement said: "The force is aware of allegations on social media and further enquiries will be carried out".
A series of incidents of racial abuse - both in stadiums and on social media - have occurred this season, with pressure growing on the game's authorities to take stronger action against the culprits.
More to follow...