Stalwarts and veterans from the ANC have once again called for President Jacob Zuma to step down with immediate effect.
Manson "died of natural causes at 8.13pm on Sunday" at a hospital in Kern County.
In a televised address late Sunday, the 93-year-old defied expectations that he would bring the curtain down on his reign.
Former President Thabo Mbeki has described a political party he once led as captured.
Zimbabwean President Mugabe stressed he was still in power after his authoritarian 37-year reign was rocked by a military takeover.
On Sunday Mnangagwa was named president of the ruling ZANU-PF in place of Mugabe, putting him one step away from the top job.
ZANU-PF sacked President Robert Mugabe as party leader Sunday marking the accelerating collapse of the 93-year-old’s support and power base.
President Robert Mugabe was dismissed as leader of Zimbabwe’s ruling ZANU-PF party on Sunday in a move to force a peaceful end.
Mugabe remains in office but now faces overwhelming opposition from the generals, much of the Zimbabwean public and from his own party.
Police in Durban used teargas and rubber bullets to disperse an angry crowd after eThekwini mayor failed to arrive for a meeting with the community.