Fans clashed on the pitch after Celtic knocked Rangers out of the Scottish Cup on penalties.
Some Celtic fans ran on to the field at the final whistle to celebrate after their team secured a 4-2 win in the shootout, and a place in the competition’s semi-finals, after a goalless draw.
A number of Rangers supporters also ran on to the pitch at the end of the Old Firm derby.
Missiles were thrown, and there appeared to be some minor skirmishes, before order was restored by police and stewards, who formed a barrier between the two sets of supporters.
Celtic’s team, backed by 7,500 fans at one end of the stadium, had not registered a shot on target during 120 minutes of action in Glasgow.
The Scottish Football Association has condemned the pitch invasion.
A statement read: “The Scottish FA condemns the behaviour from supporters entering the field of play following today’s Scottish Gas Scottish Cup Quarter-Final at Ibrox Stadium.
Footballer, 15, dies after collapsing during Oxford United academy game
US World Cup co-hosts ‘very supportive’ of Iran playing in tournament
Macclesfield FC urge fans to stay away after suspected arson attack on stadium
“An investigation will be carried out immediately in line with the Judicial Panel Protocol.”
Rangers head coach Danny Rohl said that he did not see the pitch invasion.
Rohl said: “I was not on the pitch in the moment, I did not see it until now. I think we all know the emotional situation after a game. Nobody likes to see this.
“It was a great atmosphere for 120 minutes, and should be like this. The other things should not be in the stadium – or in football.”
Celtic manager Martin O’Neill saw “some kind of fracas” as he headed for the tunnel.
O’Neill said: “It’s a big derby game, and I think there was a lot of jubilation at us winning. The fans spilt over, and I suppose it is very difficult to quell that.
“As we were making our way back, there was some kind of fracas, and someone had tried to get on the field. I don’t know, all I saw was a bit of a scrum down at the bottom.”
