ANC MP Makhosi Khoza suddenly pulled out from delivering a speech at a Young Communist League event in Durban on Sunday for security reasons, the organisation said.
"The ANC regional leadership decided to unleash anarchy by sending ANC branches not to participate in a YCL SA programme but to disrupt it," YCL SA national deputy secretary Isaac Luthuli told News24.
"Makhosi Khoza was to give a keynote address. Due to security reasons she understandably pulled out."
He said the rest of the programme continued on Sunday.
"As the YCL we reiterate that President [Jacob] Zuma must step down."
On Sunday, Khoza at first told News24 that she could not speak as she was on another call. Later her phone was switched off.