About 145 000 policemen, traffic officers and prison warders will join the public sector wage strike on Saturday, the Police and Prisons Civil Rights Union (Popcru) said on Wednesday.
"Hereby today, we wish to categorically state intention to join the current national public service strike action as a revolutionary duty to ensure that our working class power and a demand for a living wage is asserted," Popcru spokesman Norman Mampane said in a statement.
"We have served... a notice outlining our position to join... from the 28th of August 2010."
Mampane reiterated the workers' demand of an 8.6 percent wage increase.
Earlier in the day, ANC secretary general Gwede Mantashe told reporters that the possibility of a strike by Popcru would be "anarchy".
"We will regard that as anarchy," said Mantashe.
"Anarchy will never translate into a solution," he said. - Sapa