The death toll from the unrest that followed the jailing of former President Jacob Zuma has risen from 276, announced on Wednesday, to 337.
Acting Minister in the Presidency Khumbudzo Ntshavheni said that more people had died from injuries sustained during the violence.
The minister said that 213 murder cases were being investigated.
She added that some of the latest deaths were of people succumbing to injuries sustained during the riots.
Widespread looting and burning of businesses broke out earlier this month, a day after former President Jacob Zuma began serving a 15-month jail term for ignoring a corruption inquiry.
The violence escalated into the worst unrest since the end of apartheid, prompting President Cyril Ramaphosa to label it an attempted “insurrection”.
Thousands of businesses were looted in the riots last week that mainly affected the provinces of KwaZulu-Natal and Gauteng. End