Men in white T-shirts with poles are seen in Yuen Long after attacking anti-extradition bill demonstrators at a train station, in Hong Kong, China July 22, 2019.

Men in white T-shirts and carrying poles are seen in Yuen Long after attacking anti-extradition bill demonstrators at a train station in Hong Kong, China, July 22, 2019.

A pro-government supporter is warned by anti-extradition supporters to leave the office building of pro-China lawmaker Junius Ho in Tsuen Wan, Hong Kong, China July 22, 2019.

A National Emblem splashed with paint after anti-extradition bill protest is seen outside Chinese Liaison Office in Hong Kong, China July 21, 2019.

Anti-extradition demonstrators hold makeshift shields, after a march to call for democratic reforms in Hong Kong, China July 21, 2019.

Hong Kong Chief Executive Carrie Lam holds a news conference in Hong Kong, China July 22, 2019.

Men in white T-shirts with poles are seen in Yuen Long after attacking anti-extradition bill demonstrators at a train station, in Hong Kong, China July 21, 2019.

Men in white T-shirts with poles are seen in Yuen Long after attacked anti-extradition bill demonstrators at a train station, in Hong Kong, China July 22, 2019.

An anti-extradition bill demonstrator sprays CCTV camera outside the Chinese Liaison Office after a march to call for democratic reforms, in Hong Kong, China July 21, 2019.

An anti-extradition demonstrators have tear gas fired at them while they clash with riot police, after a march to call for democratic reforms, in Hong Kong, China July 21, 2019.

Anti-extradition demonstrators march to call for democratic reforms, in Hong Kong, China July 21, 2019.

Riot police clash with anti-extradition demonstrators, after a march to call for democratic reforms in Hong Kong, China July 21, 2019.

Anti-extradition demonstrators hold makeshift shields, after a march to call for democratic reforms in Hong Kong, China July 21, 2019.

Riot police faces anti-extradition bill demonstrators amidst tear gas, after a march to call for democratic reforms, in Hong Kong, China July 21, 2019.

A protester sprays CCTV camera outside the Chinese liaison office after a march to call for democratic reforms, in Hong Kong, China July 21, 2019.

Riot police fire tear gas, after a march to call for democratic reforms in Hong Kong, China July 21, 2019.

Anti-extradition bill demonstrators react as riot police fire tear gas after a march to call for democratic reforms, in Hong Kong, China July 21, 2019.

Anti-extradition bill demonstrators react as riot police fire tear gas after a march to call for democratic reforms in Hong Kong, China, July 21, 2019.

The office of pro-China lawmaker Junius Ho is seen destroyed by anti-extradition supporters in Hong Kong, China July 22, 2019.

A pro-government supporter scuffles with an anti-extradition supporter outside the office of pro-China lawmaker Junius Ho in Tsuen Wan in Hong Kong, China July 22, 2019.

An anti-extradition demonstrator runs, after a march of to call for democratic reforms, in Hong Kong, China July 21, 2019.

A barricade burns as riot police stand guard, after a march to call for democratic reforms in Hong Kong, China July 21, 2019.