A Polish woman was floored by a punch during a race row on a late-night Tube train, police said.
The alleged victim was travelling on a westbound District line train shortly after midnight when a man became aggressive and began to argue with her.
Officers investigating the attack said he made reference to the fact she was Polish before punching her in the face.
The force of the punch knocked the woman to the floor of the train.
Her attacker is said to have left...