The number of people killed in days of protests in South Africa rose to at least 72 on Tuesday, police said, as soldiers and police on the streets struggled to quell some of the worst looting and violence the country has seen in years.The number of people killed in days of protests in South Africa rose to at least 72 on Tuesday, police said, as soldiers and police on the streets struggled to quell some of the worst looting and violence the country has seen in years.