Video has emerged of a woman ranting at a black passenger on a crowded underground train before telling him: 'you have a problem because you guys used to be slaves'.

Footage shows the young woman, who appears to be speaking with an eastern European accent, get into a heated argument with a man sitting opposite after apparently asking him to move seats.

Passengers can be heard shouting 'shut up' after she makes the racist remark. More footage uploaded to video sharing site Vine captures her saying: 'I have black friends, I'm not racist.'

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Shocking: Footage shows the woman getting into an argument with a passenger on the tube after apparently asking him to move, before telling him: 'You guys have a problem because you used to be slaves'

The incident is believed to have happened last month on a Jubilee line train around Stratford station in east London.

British Transport Police say they are investigating the incident, and are appealing for whoever shot the video to come forward.

A spokesman said: 'We have been made aware of a video posted online which appears to show an altercation onboard a London Underground Jubilee line train.

'Officers are currently analysing the video and are appealing for the person who recorded it to come forward.'

Anyone with information about the incident, is asked to contact British Transport on 0800 40 50 40, or text 61016, quoting reference T/B11 of 12/02/2015.