Extremists may be targeting US interests in South Africa, to possibly include USA spokesman for the South African ministry of state security told AFP that the government was aware of the US announcement, but that it had no immediate comment.
Government facilities and other facilities identifiable with US business interests," the embassy statement said.
Remain aware and vigilant of your surroundings. Be vigilant and take appropriate steps to enhance your personal security."
The embassy issued a general security alert last week ahead of the September 11 attacks anniversary, but the warning on Tuesday appeared to signal a new level of concern. Security analyst Ryan Cummings said the US had last issued a "terror threat" in South Africa in 2009.
The embassy was unable to confirm the date. "One would not immediately associate South Africa with Islamic extremism, which is the driver of international terrorism against US interests," said Cummings, a Cape Town-based analyst at Red 24, a risk management firm.
"We haven't had an extensive history of transnational terrorists targeting US interests (but) there has been evidence that South Africa serves as some form of a gateway or potential logistics and financial hub. "The fact that this warning speaks specifically to South Africa means the perceived threat is specifically within our borders."