South Africa is on course for a three-day victory over Bangladesh in the second cricket Test, taking four wickets in the morning session to reduce the tourists to 4-92 in their second innings.
Bangladesh still need 334 runs to make South Africa bat again after being forced to follow on.
Bangladesh were all out for 147 in their first innings in response to South Africa's 4-573 declared.
The Bangladesh batsmen were up against it again on Sunday as Soumya Sarkar (3), Mominul Haque (11), Imrul Kayes (32) and captain Mushfiqur Rahim (26) all fell before lunch on day three at Mangaung Oval.
Quick bowler Kagiso Rabada had 2-18 to go with his five-wicket haul in the first innings.
Duanne Olivier took one and Wayne Parnell had Mushfiqur lbw at the end of the session.
Mushfiqur reviewed the decision but was unsuccessful and Bangladesh faced a big task to take the game to a fourth day.
South Africa lead the two-test series 1-0.
