A video of a woman who appears to tell a passenger that his ancestors "used to be slaves" during an argument on the London Underground is being investigated by police.
The incident had erupted between the woman, who appears to be European, and the black man on the Jubilee line train between Stratford and West Ham.
The man can be heard shouting at the woman and he said she allegedly told him "don't touch me" after he accidentally bumped into her.
The woman can be heard to say: "You called me racist, I'm not racist. That is why people have a problem with you guys. I have black friends. I'm not racist."