MANILA, PHILIPPINES - NOVEMBER 18: A protester sprays graffiti on a container van serving as a barrier as members of student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: Student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: Riot police struggle to contain protesters as members of the student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: Riot police struggle to contain protesters as members of the student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: Riot police struggle to contain protesters as members of the student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: Riot police struggle to contain protesters as members of the student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: - A protester offers her handkerchief to an anti-riot police officer as members of student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: Student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)

MANILA, PHILIPPINES - NOVEMBER 18: - A protester offers her handkerchief to an anti-riot police officer as members of student group “League of Filipino Students” attempt to march towards the Philippine International Convention Center (PICC), the venue of the Asia Pacific Economic Cooperation (APEC) Summit in Pasay City, 18 November 2015. Heightened security measures are implemented in the capital as leaders of different nations take part in the international conference. (George Calvelo - Anadolu Agency)