Footage from Monday's Old Firm clash appears to show a missile striking a fan on the head.
The video was uploaded to TikTok after Rangers and Celtic drew 2-2 at Ibrox on January 2..
Hoops fans are filmed cheering their players before a man is apparently struck by by a missile and left with blood pouring from an injury, reports the Daily Record.
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Immediately following the incident supporters around the injured individual stop singing and are heard calling police for assistance.
A man is seen putting out his blood stained hands and showing them to police officers.
Police Scotland confirmed they have launched a probe after receiving reports of 'items thrown during the match,' and said one man was left with a head injury. Cops also said that two men, aged 17 and 66, were arrested at Ibrox for unrelated acts of disorder.
A Police Scotland spokesperson said: “We are aware of items thrown during the match at Ibrox on Monday, January 2.
“One man suffered a minor head injury after being struck by one of these items. Enquiries into the incidents are ongoing.”
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