Premier League club West Ham says it will ban any fans who were filmed chanting anti-Semitic abuse ahead of a game at Manchester United.
Journalist Darren Richman posted the video of the offensive song about West Ham rival Tottenham, which was filmed by his mother on public transport in the northern English city on Saturday.
West Ham says it is "disgusted" by the video circulating on Twitter.
In a statement, West Ham says it is "taking immediate action to try to identify the offenders, whose details we will be handing over to the police and will be banned for life from London Stadium and from travelling with the club."
West Ham adds that it does not "want people like this associated with West Ham. They are not welcome at our club, they are not welcome in civilized society."
West Ham lost 2-1 at Old Trafford.