Police have released images of men they wish to speak to following an incident of West Ham fans chanting "vile" anti-Semitic songs on a train.

British Transport Police (BTP) said the incident happened on the 7.03pm service between Watford Junction and Milton Keynes on August 15, after West Ham played Leicester City at Upton Park.

PC Michael Botterill said: “A man, who boarded the train at Watford Junction, took his seat in the first class carriage.

“A group of West Ham fans were already seated and, as the train pulled away, they began to sing anti-Semitic songs.

“The man, quite rightly, took offence to these vile songs and challenged the group over their language.

“However, they refused to stop and continued with their chanting.”

Police received reports from several other witnesses to the behaviour of the men, who are believed to have left the train at Northampton.

PC Botterill said: “This sort of casual racism has gone unchallenged for too long.

“We know the vast majority of football fans are decent people, but for those who continue to make life unpleasant for the travelling public, our message is clear: we will not tolerate your yobbish behaviour.

“I think the men in the pictures we are issuing today, have information about this incident.

“Please let us know who they are.”

Anyone with information is asked to contact BTP on 0800 40 50 40, or text 61016, quoting reference MSUB/B4 of 12/10/2015

Information can also be passed anonymously to the independent charity Crimestoppers on 0800 555 111