A third British tourist died in hospital after an overland tour vehicle overturned in Mpumalanga on Thursday, a hospital spokesperson said.
Nelspruit Medi-Clinic spokesperson Robyn Baard said a 22-year-old student died at around 20:00.
"He had multiple internal injuries and organ damage," Baard said. She could not give a definite cause of death on Thursday evening.
"He had been to the theatre twice during the night but died because of the extent of his injuries," News24 reports.
The crash happened a few miles from Barberton on the Bulembu road, near Nelspruit, at lunchtime when the driver apparently lost control of the bus and it overturned.
A spokesman for the British High Commission said four casualties remained in intensive care or in a "highly dependent" state. Another eight patients were staying at the hospital overnight for observation. Those admitted to the hospital included the two course lecturers, The Press Association reports.
US President Joe Biden and Iraqi Prime Minister Mustafa Al Qadimi signed an agreement on July 26 to formally end the USA's military presence in the country by the end of the year