Ally McCoist has blasted sickening graffiti that was left by Hibernian supporters in the Rangers away end at Ibrox on Saturday.
Gers and Hibs both condemned the graffiti and stickers left in the away section, which mocked the disaster at the stadium in 1971.
Under 1,000 Hibs supporters were in attendance for the 4-0 defeat and when they left it emerged that some seats had been defaced with the number 66.
The 1971 Ibrox disaster was a crush among the crowd at a Rangers v Celtic game which led to 66 deaths.
There were also photographs of stairway 13, where the disaster occurred, stuck on the seats, with the images accompanied by the words, “Stairwell Thirteen – it’s the greatest sight that I have ever seen”.
Graffiti also mocked the death of Queen Elizabeth II and supported the IRA.
Speaking on talkSPORT, McCoist slammed the sickening stunt as he questioned the mental state of those involved.
He said: "Putting stickers and writing 66 on the seats at Ibrox... I actually don't think football is the problem there, I don't. That's a mental problem with someone. These guys are using football as the vehicle for their aggression and their stupidity. That problem is deeper than football, that is a societal problem.
"That is people who are not right in the head to be brutally honest with you. Who in their right mind goes to organise stickers and celebrate the death of people? It's absolutely ridiculous."
Hibernian have since moved swiftly and one fan has been banned from attending matches.
A Hibs statement on Saturday read: “Hibernian FC is aware of the intolerable graffiti and stickers found in the away end at Ibrox today and condemns the behaviour of the individuals that were involved.
“The club will work with Rangers to identify those responsible and will take the most serious action possible against anyone involved.
“If any Hibernian FC supporter has any information that could assist the club to help identify these individuals, they should contact club@hibernianfc.co.uk and the information provided will be dealt with in the strictest of confidence.”
