Ferguson riots: Gunfire heard during violence and looting

There have been scenes of violence in the US suburb of Ferguson following a grand jury decision not to charge a police officer in the fatal shooting of an unarmed black teenager Michael Brown.

Within hours, thousands rallied across US cities to express their anger at the decision - but the protests in Ferguson, where the shooting took place, have been the most explosive.

Shots were fired, shops looted and at least a dozen buildings set alight with firefighters also targeted.