On Sunday, Chinese soldiers warned Hong Kong demonstrators that the protesters had direct contact with the mainland military for the first time in four months of anti-government demonstrations, firing lasers at military camps in the city.
The confrontation with the People's Liberation Army (PLA) ended with violent clashes at several locations after the rally of tens of thousands of protesters took place earlier on Sunday.
The police fired tear gas and crowded the crowd with batons, and some demonstrators threw bricks and petrol bombs at the police at night.
The protesters concealed their faces and ignored the colonial emergency decree issued by the authorities last Friday, which banned the wearing of masks.