UEFA have opened disciplinary proceedings against Rangers after children got on the pitch after the Europa League clash against Borussia Dortmund at Ibrox.
The club said on Friday that entering the field of play “at any time is unacceptable and forbidden”.
In a statement, Rangers said: “We have a zero-tolerance approach to those invading the pitch. In particular, any parent found to assist their child in entering the pitch area will be subject to club disciplinary policy.
“Our players have been advised that should not provide a shirt to any spectator entering the pitch area.”
Separately, three people were arrested in connection with disorder at the Europa League clash on February 24.
Police Scotland said two male teenagers – aged 15 and 19 – were arrested, along with a 58-year-old man.
The match ended in a 2-2 draw, with Rangers progressing to the last-16 of the competition 6-4 on aggregate.