In 2000 , after being sent off during an Old Firm match , Rangers midfielder Barry Ferguson was involved in a violent brawl with Celtic fans at a hotel later in the same evening ; a year later , Ferguson ( by now club captain ) was sitting in the stand when he appeared to throw ice packs towards the Celtic dugout after Rangers conceded a late goal , however the referee missed the incident and no action was taken . In that same match , a Celtic supporter was photographed making an ' aeroplane ' gesture towards American Rangers player Claudio Reyna a few weeks after the September 11 attacks . A 2004 match at Ibrox which " descended into even more mayhem and madness than usual " led to a police enquiry over the conduct of the players and staff
September 11 attacks
September 11 attacks
Old Firm