"We're not giving out any details now, but it's been in the planning for some time to build an assembly plant in SA," said Mumbai-based spokesman Debasis Ray.
"We're very excited that it's got to the point that it's come to fruition. We're on the doorstep of a major milestone."
A government source told the newspaper that the ground-breaking ceremony was set for July 22 for the facility in Pretoria that was likly to produce a commercial vehicle or bus for the local and African market.
India's top vehicle maker Tata Motors produces the world's cheapest car, the Nano, and is known for lower-cost commercial vehicles.
In May Tata reported a nearly fourfold increase in annual profit, boosted by booming sales and strong demand for British brands Jaguar and Land Rover which it bought three years ago.
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