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The ANC says the expulsion of metalworkers union, Numsa from trade union federation Cosatu is a tragic development.
Spokesperson, Zizi Kodwa says the unity of Cosatu is important to the party.
He said the ANC would comment further after it had received a report of the outcomes of the Congress of SA Trade Unions' central executive committee meeting.
The National Union of Metalworkers of SA was expelled during a special CEC sitting late on Friday evening.
Numsa secretary-general, Irvin Jim confirmed the expulsion on Saturday.
The ANC set up a task team, led by party deputy president Cyril Ramaphosa, in April to help Cosatu overcome infighting.
It met 19 Cosatu affiliates to canvass their views on tensions within the federation, and to get input on whether the tripartite alliance between the ANC, Cosatu, and the SA Communist Party, should continue.