Clashes at Hong Kong Occupy Central protest

Police have used tear gas and pepper spray to disperse pro-democracy protesters outside Hong Kong's main government building, after a week of escalating tensions.

Students and activists oppose Beijing's decision to rule out fully democratic elections in Hong Kong in 2017.

Hong Kong Chief Executive CY Leung said the demonstration was "illegal" and elections would go ahead as planned.

The BBC's Jiuliana Liu says the situation on the ground is "extremely chaotic" and that protesters show no sign of dispersing.