Security services seem to have been jolted into action by threats of retaliation against South Africa should it provide military support to fight an ISIS-affiliated group's insurgency in Mozambique.
The police raid and arrest of an alleged kidnapping syndicate in a Kliprivier house south of Johannesburg has been described by South African authorities as "one of the biggest breakthroughs we have had in our investigations of international terrorism in South Africa".
Apart from kidnapping, the five foreign nationals are being investigated for links to the Islamic State (IS) fundamentalist group, security sources have revealed.
Security services seem to have been jolted into action by the threats that Islamic State issued on one of its websites earlier this month to retaliate against South Africa if it provided military support to Mozambique to help it fight an insurgency by an Islamic State-affiliated group in the country's Cabo Delgado province.
There is growing speculation among security analysts that South Africa is already training forces to enter Mozambique, although the government has so far confirmed nothing - except to say it has been discussing assistance with Maputo.
National police commissioner General Khehla Sitole told journalists on the scene of the Kliprivier...