FILE: Numsa secretary Irvin Jim said the leadership of Cosatu was manipulating who could attend a special national congress.
JOHANNESBURG - The National Union of Metalworkers of South Africa (Numsa) is calling on South African citizens to boycott Zambian products.
The union said Zambia had degenerated into authoritarianism under President Edgar Lungu.
In April, opposition leader Hakainde Hichilema was charged with treason after allegedly refusing to give way to President Edgar Lungu's motorcade.
If found guilty, he could face the death penalty for what his supporters believe are trumped-up charges.
DA leader Mmusi Maimane was refused entry into Zambia to visit the jailed leader last week.