Rangers manager Steven Gerrard said he was disappointed but not surprised by reports midfielder Glenn Kamara was targeted by a crowd of mainly school children during their 1-0 Europa League defeat to Sparta Prague on Thursday.
In March, Finland's Kamara complained of racial abuse by Slavia Prague's Ondrej Kudela during a Europa League tie, and the continent's football governing body UEFA banned the Czech defender for 10 games.
Kamara was mocked during Thursday's game at the Letna Stadium, which was initially ordered by UEFA to be closed for the match, after Sparta supporters racially abused Monaco's Aurelian Tchoumeni in a Champions League qualifier.
It later decided to allow 10,000 children to participate in games against the Scottish champions.
Media reports said that when Kamara was sent off, the jarring reached its peak in the second half.
"If those are facts and this is the truth, then I am extremely disappointed, but not surprised. We need facts, if it is true we need confirmation," Gerrard told reporters. During the match, it was learned that Kamra was singled out by the fans.
Gerrard said more would have to be done to prevent spectators from targeting players.
Gerrard said, "Not only me, everyone around the world is demanding greater and better and more severe punishment for racism. It needs to be eradicated."
"But as long as the Powers do more and take it more seriously, until that happens, we're going to have to deal with these questions for a long time."