GLASGOW, Scotland - Celtic emerged victorious over Rangers in Sunday's intense 'Old Firm' derby, but the Scottish Cup quarter-final was overshadowed by ugly scenes. Following Celtic's 4-2 penalty shootout win after a goalless regulation time, fans stormed the pitch and ignited flares at Ibrox stadium.

Police and stewards intervened to separate rival supporters amidst a chaotic atmosphere that saw objects thrown. The Scottish Football Association has vowed to investigate the incidents. This encounter marked Celtic's return with a full allocation of away fans for the first time in eight years. The historic Glasgow derby, dating back to 1888, is renowned for its deep-rooted rivalry.