Mohamed Salah was the target of racist abuse during Liverpool's 1-1 draw at West Ham and the incident is being investigated.
West Ham are investigating after a video emerged of a fan directing racial abuse towards Liverpool forward Mohamed Salah during Monday's Premier League fixture.
Salah racially abused by Hammers' fan
On the mobile phone footage, which was shared on social media, a supporter in the West Ham end can be heard directing expletives towards Salah and abusing the Egypt international on the grounds of his Muslim faith.
A statement from West Ham read: "At West Ham United, we have a zero-tolerance policy to any form of violent or abusive behaviour.
"We are an inclusive football club. Regardless of age, race, religion or belief, marriage or civil partnership, pregnancy or maternity, sex, sexual orientation, gender reassignment or disability, everyone is warmly welcomed at London Stadium.
"Anyone identified committing an offence will have their details passed to the police and will face a lifetime ban from London Stadium. There is no place for this kind of behaviour at our stadium."
A big point and a big performance ⚒️https://t.co/uFQRdX9MlM— West Ham United (@WestHamUtd) 5 February 2019
Omnisport understands the police are aware of the incident, while anti-discrimination campaign group Kick It Out have also sought further information.
West Ham and Liverpool played out a 1-1 draw, with Michail Antonio cancelling out Sadio Mane's opener for Jürgen Klopp's side before half-time.