Who are the AZ Ultras who attacked West Ham fans… but were held off by just two supporters?
Mexico fan violence: At least 22 injured and matches suspended after fighting at top-flight match, Football News
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Ajax-Feyenoord Scrapped After Flares Thrown On Pitch, Violence Erupts
SPECIAL REPORT: Violence in the stands is sweeping the NFL - fighting fans are going viral, the league insists supporter safety is 'our top priority' but what is behind the problem and
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A History of Fatal Sports Fan Violence
Jaguars have plenty of issues to fix entering 2-game London stretch
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