People were sought after violence and racist chanting

A spokesman for Staffordshire Police said officers had made contact with most of the 15 previously and arranged for them to attend a police station.

They were charged with football disorder offences and will appear in court in mid-April, the spokesman said.

A total of 32 people have now been arrested by police investigating trouble at a match on 19 February.

Incidents of disorder and racist chanting broke out at the FA Cup 5th round match between Stoke City and Birmingham City.

Most of those arrested are from north Staffordshire.