No shots were fired and no injuries were reported in the armed robbery, which occurred at around 7:45 p.M. Tuesday at O.R. Tambo International Airport, said Airports Company South Africa, which manages the facility.
"The robbers proceeded to gain access to the airside of the airport where they removed an undisclosed amount of money from a sealed container," the statement said.
With sirens and blue lights on, the thieves pulled up at a restricted gate in two vehicles, one with "what appeared to be police markings," the statement said, adding that security at the airport has since been tightened.
A company that tries to counter organized crime in the banking industry said it was deeply concerned by the boldness of the criminals as well as their ability to gain access to a secure area.
More From This Section
"It is evident that the heist was executed using accurate information," the South African Banking Risk Information Centre said in a statement. "This incident exacerbates an already dire situation of attacks on cash in transit vehicles and staff."
In 2006, thieves stole large amounts of cash from a plane at O.R. Tambo airport. Some gang members were later convicted. South African police have periodically warned that some criminal gangs tail arriving travelers in vehicles from the Johannesburg airport and rob them on the road or when they reach their destination.