Chelsea will not be punished by the Football Association over anti‑Semitic chants but have threatened to impose their own bans on guilty fans.

A large section of the club’s 3,000 travelling support sang a song during Chelsea’s 2-1 win at Leicester that was abusive towards Jews.

The chant, which used new Chelsea striker Alvaro Morata as part of the lyrics, was aimed at rivals Tottenham, who have a large Jewish following.

Chelsea spoke out strongly against those responsible soon after the game and are helping the FA, who have launched an investigation of their own, into identifying the perpetrators.

While the FA are looking to ban anyone identified to have taken part in the chanting, they are not considering action against the Blues.

Chelsea’s swift response has been taken into consideration as well as the fact it was an away game and they cannot be held as accountable for fans’ behaviour because they are not responsible for stewarding.

Morata was horrified that his name was used as part of the song and tweeted his disapproval.

The 24-year-old Spain international said: “Since I arrived, I have been able to feel your support every single day, you are amazing and I’d like to ask you to please respect everyone!”

The FA are contacting Leicester to get hold of CCTV footage and with Chelsea’s assistance will look for anyone involved in the chant.

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Both Chelsea and the FA are also encouraging supporters in the away section to report anyone they saw singing it.

And Chelsea have now confirmed they will support criminal prosecution and issue lifetime bans if any supporter is caught repeating the offensive song.

Chelsea's Head of Communications, Steve Atkins, said on Monday: "We made an initial statement after the game the other night. I'm happy to repeat, but also make clear: Chelsea Football Club finds all forms of discrimination abhorrent and the language that was used in that song the other night we find totally unacceptable.

"People that use this kind of language against others always try to argue a grey area. There is no grey area. That language used was anti-Semitic.

Read more Chelsea and Morata condemn section of supporters for anti-Semitic song

"We have a zero tolerance policy towards it. If there is evidence that season ticket holders or members took part in that, and take part in it in the future, then we will take the strongest possible action against them, which includes bans.

"People should know that the police will be investigating and they will investigate all future such episodes. And we will support the police in anything they need us to do, assist their enquiries, and we will also support criminal prosecutions of such behaviour and activity.

"We must be clear on this because it has to stop."