JOHANNESBURG - Secretary General Bheki Ntshalintshali says ANC Chairperson Gwede Mantashe will most probably address the Cosatu congress on Tuesday.
He said, "it's a clear message that workers are frustrated."
Unhappy delegates booed Mantashe and refused to be addressed by him.
The trade union federation is gathered in Midrand for its 14th national congress.
Secretary General Bheki Ntshalintshali says Mantashe will most probably address the congress on Tuesday.