Hong Kong: Hong Kong police drew their guns and fired a warning shot Sunday night after protesters attacked officers with sticks and rods, and brought out water cannon trucks for the first time, an escalation in the summer-long protests that have shaken the city’s government and residents.

The day’s main showdown took place on a major drag in the outlying Tsuen Wan district following a protest march that ended in a nearby park.

While a large crowd rallied in the park, a group of hard-line protesters took over a main street, strewing bamboo poles on the pavement and lining up orange and white traffic barriers and cones to obstruct police.