The Celtic won the match 4-2 on the penalties and their fans, who were occupying the full Broomloan Road Stand since being reduced to a 1,000 in 2018 from what was traditionally 7,500, ran onto the pitch to celebrate. The Rangers followed and clashed with them with flares going up in the air.

'Extreme hostility and violence': WATCH | Fans invade pitch, create riot-like scenes during Old Firm derby in Scottish Cup

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'Extreme hostility and violence': WATCH | Fans invade pitch, create riot-like scenes during Old Firm derby in Scottish Cup