The Football Association has launched an investigation into the crowd trouble that marred Wolves' FA Cup victory over local rivals West Bromwich Albion after fans fought a bloody battle on Sunday.
Play was halted by referee Thomas Bramall late in the second half at the Hawthorns when fans spilled onto the pitch as fighting broke out in one corner of the stadium.
One supporter was escorted away with blood streaming from a head wound.
West Midlands Police said two people were arrested after the disturbance and another was arrested prior to the match for possession of an offensive weapon, while a man was taken to hospital with head injuries.