West Ham say they have handed over evidence to the police in relation to an investigation into what they described as "abhorrent racist abuse" aimed at Liverpool's Mohamed Salah.
The Egypt international was filmed on a mobile phone from a section of supporters as he was taking a corner during Premier League clash between Liverpool and West Ham at the London Stadium on Monday night.
The video clip contains audible expletives directed at the Liverpool player, including comments against his Muslim religion.
"After a thorough and immediate investigation following the abhorrent racist abuse aimed at Liverpool striker Mohamed Salah on Monday night, West Ham United can confirm that it has handed evidence to the Metropolitan Police," reads a statement on the club website.
"The club is unequivocal in its stance – such abuse will not be tolerated.
"There is no place or excuse for this kind of behaviour."
Liverpool drew that match 1-1, which was a huge blow to their title chances. Man City have since clinched the top spot with a 2-0 win over Everton.