The issue focused on the government's tax policy, with public concern about public services and political rights.

A law enforcement official who was not authorized to be named said it was an intelligence service report. The official added that there were no legal grounds for detaining him.

Niran Noyatmoko, a spokesman for Dlamini-Zuma, said: "We are sure that he is just being held in order to talk to his lawyer. He has been told that he can