Red shirts attack, injure white-mask people in Chiang Mai – The Nation, June 14, 2013
…Police were present but did not try to stop the red shirts from attacking the white-mask demonstrators…
Chiang Mai Redshirts Clash With ‘Guy Fawkes’ Crowd – Khaosod, June 14, 2013
…”We were here just to find out what they campaign about, but they provoked us. One of them took pictures of us, so some Redshirts are angered,” Mr. Worawut said. He vowed that his group would stage counter-protest wherever the White Mask group appears in order to “observe” them…