West Ham are "disgusted" after a video of their fans chanting at antisemitic song on a Manchester tram was circulated online.
Tottenham Hotspur, on a Manchester tram, at Manchester United at Old Trafford.
Over the last few weeks.
In a statement, West Ham said, "We are disgusted by the contents of the video circulating on social media this evening.
"We are taking immediate action to try to identify the offenders, whose details we want to be able to deal with.
"West Ham United is unequivocal in its stance – there is no place for this kind of behavior at our club.
They are not welcome at civil society. "
On Thursday, three Chelsea fans were involved in chanting racist abuse about Egypt and Liverpool player striker Mo Salah.
On the same night, Arsenal condemned abuse directed at Napoli's Kalidou Koulibaly at the Emirates stadium, and said they would be the perpetrator of a lifetime ban.
In a statement on Saturday, FIFA President Gianni Infantino said: "In recent days, it has been very sad to see a number of racist incidents in football.
"Racism has no place in football, just as it has no place in society either.
"FIFA stands together with Prince Gouano, Kalidou Koulibaly, Raheem Sterling, Danny Rose, as well as any other player, coach, fan or participant in a football match who has suffered racism, whether at the highest professional level or in a school playground Racism needs to end. Full stop.
"We introduced the so-called 'three-step procedure' at our tournaments: a mechanism that allows referees to go as far as to abandon a match in case of discriminatory incidents.
"FIFA urges all member associations, leagues, clubs and disciplinary bodies to adopt the same procedure, as well as a zero-tolerance approach to incidents of racism in football, and to apply for sanctions for any such kind of behavior."
Last month, England star Raheem Sterling faced chanting by Montenegro fans in their Euro 2020 qualifier.