Users of Qatar 2022's official Hayaa app have been sent notifications warning them only to travel to grounds if they are in possession of valid tickets.
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It comes after angry scenes between police and spectators outside the gates ahead of Morocco's penalty shootout win over Spain.
The Qatar Supreme Committee is expected to release a statement on the disturbances.
Videos emerged on social media ahead of Morocco's win over Spain showing police at Al Rayyan's Education City Stadium pushing supporters during confrontations.
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Fans were forced up against chain link fencing while other clips showed fights breaking out.
In one video, a woman in a Spain shirt is heard telling security forces: "Look at these people, it's dangerous.
"There's a baby, she's going to get trampled and there's too many people."
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Thankfully, no one is reported to have been hurt during the ugly scenes, with the match able to go ahead as planned.
But World Cup organisers are still growing concerned about the number of supporters turning up at games without tickets.