Police officers clash with pro-democracy protesters in Mong Kok. Photo: SCMP Pictures
Police officers clash with pro-democracy protesters in Mong Kok. Photo: SCMP Pictures

Triads infiltrated camps of Occupy supporters and detractors, say police

Police investigating role of Wo Shing Wo and Sun Yee On triad groups in violence

Police officers clash with pro-democracy protesters in Mong Kok. Photo: SCMP Pictures
Police officers clash with pro-democracy protesters in Mong Kok. Photo: SCMP Pictures
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