Rangers are considering refusing their allocation of away tickets for future European games in a bid to end sectarianism among their own fans.
Rangers chief executive Martin Bain is reportedly considering the dramatic action following problems during the Gers' UEFA Cup clash with Osasuna last week.
UEFA is investigating claims that Rangers fans sang sectarian songs at Osasuna's Reyno de Navarro stadium.
Meanwhile, John McMillan, secretary of Rangers Supporters Club, has called for the club to take a hard-line action on any supporter involved in sectarianism.
"The club and the majority of the supporters have done their damnedest to eradicate this kind of thing," he said.
"Now these morons have come out with this nonsense and I really don't know what can be done to sort this out.
"I just hope the pictures are clear enough that Rangers can identify some of these people because they should be locked up."