The head of a Scottish football fan group has said he was "angry" after Celtic and Rangers fans both charged on the Ibrox pitch at the end of Sunday's Scottish Cup quarter-final.
Celtic won on penalties after a goalless 120 minutes, after which both sets of supporters spilled out from the stands.
Police described the scenes as "shameful" and made a number of arrests.
Stuart Murphy, the chief executive of the Scottish Football Fans Association, described the situation as a "debacle" and says it is not fair on the majority of match-going fans.
"I'm angry this morning," he told BBC Radio Scotland.
"Actually, I'm angry on behalf of the majority of all decent fans, who will all feel tarnished and stained by that debacle yesterday which is the only way to describe it.
"I was at the Old Firm cup final 45 years ago and 45 years on, we've not moved on at all, so this morning is not a good day for the game in general."
Both sets of supporters also clashed on the pitch after the 1980 Scottish Cup final, after which there were 200 arrests and alcohol was banned from sports grounds in Scotland. There are still no alcohol sales at football stadiums.
