Police have launched an investigation into sickening footage of Chelsea fans chanting racist songs on a Tube train.

Footage of the fans emerged following Chelsea’s 2-1 victory over London rivals Tottenham Hotspur in Saturday’s Premiership match.

In the video, the group chant anti-Semitic abuse at Tottenham supporters while travelling on the District line away from the game at Stamford Bridge, west London.

The vile song refers to the fact that the north London side have a traditionally large proportion of Jewish fans.

A bystander told the Daily Mirror the group were “goading any Spurs fans they could” on the train and at stations.

British Transport Police have now confirmed they are investigating the "unacceptabe" chanting.

A spokesman told the Standard: “Intimidating or abusing anyone because of who they are or because of which football team they support is completely unacceptable.

“Since being made aware of this footage we have launched an investigation to understand exactly what happened, and who is responsible.

“We want all Londoners to feel safe and welcome on public transport and I would encourage anyone who witnesses hate crime to report it to us so we can investigate. You can do this by sending a text to 61016, our discreet reporting service.”

It comes after Chelsea fans were caught chanting anti-Semitic abuse at an Orthodox Jewish man earlier this year.

The incident took place on a train following Chelsea’s victory over MK Dons in the FA cup.

In July 2015, four Chelsea fans were banned from matches for 18 years after footage emerged of them refusing to let a black man on a Metro train in Paris.

The club released a statement before this weekend’s London derby, urging fans not to make offensive remarks.

Chelsea won the match 2-1 thanks to goals from Pedro and Victor Moses, after Tottenham had taken the lead through Christian Eriksen.