Hong Kong riot police spent much of Sunday afternoon skirmishing with small groups of masked pro-democracy protesters who held flashmob gatherings in multiple locations — although crowds were smaller and less violent than recent weekends. In the district of Mongkok, riot police burst from an unmarked van that had screeched up to a blockade made of bamboo scaffolding poles and quickly chased down multiple protesters who were pinned to the ground and detained. In Tai Po district, officers charged into a mall where protesters had tagged a number of businesses with slogans with at least two arrests made.