This is the moment a white-shirted thug armed with an umbrella reined blows on a lone woman at Yuen Long Station in Hong Kong on Sunday (July 21).<br /><br />Video filmed from above by a local citizen shows the black-shirted woman on the stairs of the station as she tried to prevent the man from getting onto a platform at the station.<br /><br />A large group of men in white shirts are also on the scene.<br /><br />The woman in the black T-shirt attempted to stop the umbrella-wielding man from walking upstairs but was hit by him at least twice.<br /><br />Another man in a white shirt stops the aggressor and allows the woman to go upstairs.<br /><br />Filmer Tse Tung Ki said it appeared that members of the white-shirted mob were fighting amongst themselves.