Manchester United supporters were heard taunting Erling Haaland's dad Alf-Inge with Roy Keane's song after spotting him on the train travelling to the FA Cup final.
The Man United fans and Alf-Inge were travelling to Wembley for the final on Saturday afternoon, as the Red Devils faced rivals Man City.
Alf-Inge was present at the showpiece in support of his son and Man City superstar Erling.
The 51-year-old, who played for Man City, Leeds and Nottingham Forest during his career, was not spared by Man United supporters.