Scores of people began descending in 15 city centres throughout the country on Wednesday for a planned march against President Jacob Zuma.
Trade union federation Cosatu will be leading the nationwide march shortly with some 450,000 members expected to participate. Police were visible and protesters were preparing banners ahead of the march due to start at 10am.
Mobilised South Africans were fighting state capture by "corrupt forces" such as the Gupta family, Cosatu spokesperson Sizwe Pamla told HuffPost SA this week.
Cosatu wants to "shut down the country" if Zuma is not removed from office.
"Corruption is a cancer in South Africa, and so the march is against government corruption, the Guptas, and -- like the KPGM report shows -- the private sector's involvement in corruption. We are calling for Zuma to step down, because it all comes down to him," Pamla said.
The strike has received the backing of several business associations, such as Business Leadership SA (BLSA). Other affiliate groups have also confirmed their support, BLSA's Bonang Mohale told EWN.
"I can confirm that Business Unity SA, which is our umbrella apex body, has already supported this call. The Chamber of Mines has [also joined], [as has] the Banking Association of Southern Africa... and the Black Management Forum."
With this support from business, the strike will be able to effect a complete, nationwide shutdown, Cosatu says.
"Our intention is to shut down the country tomorrow, but we are going to do so without the use of force. You can't fight corruption with corruption, but we have made it clear that the amount of work we have done to mobilise our members means we are fully confident that the majority of our people in business are coming out tomorrow," Pumla said yesterday.