Troops called in after jailing of Zuma ignites violence and looting

Ex-president's supporters loot shops and block highways as South Africa's highest court rules on whether to uphold sentence

South Africa's army is to deploy to help police to quell rioting and looting that has cost seven lives and led to hundreds of arrests, military officials have announced.

Authorities have been unable to stem sporadic outbreaks of violence across two provinces since the former president Jacob Zuma handed himself over to police to serve a 15-month prison sentence last week.