Riot police fire tear gas to disperse anti-government protesters during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

An umbrella is thrown at riot police during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Riot police stand guard during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters react after riot police disperse them during a march against Beijing’s plans to impose national security legislation in Hong Kong, China May 24, 2020.

An anti-government protester runs away from tear gas during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

A masked anti-government protester holds a flag supporting Hong Kong independence during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

The word "Resist", spray-painted by a protester, is seen behind riot police after they dispersed the anti-government protesters during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters march again Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

A detained anti-government protester is held by a riot police officer during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters set up roadblocks under umbrellas during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters react from tear gas during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

An anti-government protester waves the U.S. and the British colonial Hong Kong flags as riot police walk past during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

An anti-government protester is restrained by riot police during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters run away from tear gas during a march against Beijing’s plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters run after riot police disperse them during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Riot police use rubber bullets to disperse anti-government protesters during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters march again Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Anti-government protesters react as riot police fire tear gas to disperse them during a march against Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.

Riot police use pepper spray to disperse anti-government protesters during a march again Beijing's plans to impose national security legislation in Hong Kong, China May 24, 2020.