West Ham could face a FA investigation after Spurs fans were allegedly subjected to anti-Semitic abuse during their 3-1 match on Sunday.
Just a matter of days after a man was stabbed in an anti-Semitic attack before Tottenham's game in Rome, West Ham supporters reportedly sang "Viva Lazio", "Can we stab you every week?"
They were also heard hissing on several occasions, apparently mocking the mass execution of Jews during the Second World War.
According to the Mirror, the Football Association have said they will study reports and evidence before deciding whether to launch a full-scale investigation.
A West Ham spokesman told the newspaper: “We will review this on Monday and decide if we can take action.”
In a blog post, a Hammers fan said the chants made by his fellow supporters made him "sick to my stomach".
After the game, West Ham boss Sam Allardyce said he did not hear the fans' chants.
Tottenham manager Andre Villas-Boas said he did not want the issue to detract attention from what was the club's best home performance of the season.