Western Cape Premier Helen Zille said the United States has strong intelligence and have passed that intelligence onto the South African authorities.
This follows information received by the US government over the weekend that terrorists group are planning to carry out attacks against places where American citizens congregate in South Africa.
High-end shopping malls in Johannesburg and Cape Town have already been named as potential targets and are now increasing their security.
The Islamic State called on followers to launch attacks on the West during the Islamic holy month of Ramadaan.
Zille’s spokesperson, Micheal Mpofu said the Premier has stated that this need to be taken very seriously.
“We trust and hope that the intelligence officials and the SA police officials are working together with all the relevant authorities to ensure that all our shopping centres, streets, all our key areas are secure and safe.”
Meanwhile, the US Ambassador says his country will continue to work with South Africa to ensure the safety of its citizens here.
“We have been in constant and close communication and the statement that was put out by the secretly services is one we are in agreement with with,” said Patrick Gaspard.
“We are confident of the capacity here in South Africa and their ability to protect but we have an obligation to issue information to our public and we have done that with the South African services.”
It was not immediately clear what triggered the warnings. Security officials say there are no known militant groups operating in South Africa.
South African State Security Minister David Mahlobo said in a statement on Monday that “we remain a strong and stable democratic country and there is no immediate danger posed by the alert”.