Correctional Services said that “matters are under control” at Johannesburg’s Sun City Prison on Wed.
FIFA president Sepp Blatter does not have a problem with the use of vuvuzelas at the 2009 Confederations Cup matches.
This comes after some people across the world objected to the "high volume of noise" from the instrument, which they say irritates them.
Certain players from Spain have also complained. At the same time, there are many foreigners who have embraced the instrument.
Speaking at a breakfast media briefing in Sandton yesterday, Blatter said the blowing of vuvuzelas formed part of the celebrations.
Blatter said Fifa awarded the 2010 World Cup to South Africa knowing very well that there is always noise in the form of the celebrations when Africans are at games, adding that it adds to the exciting atmosphere.
Blatter said he would open Friday's media briefing of the World Cup organising committee by blowing a vuvuzela.
The committee, chaired by Cameroonian Issa Hayatou, will also look into SA's preparations for the 2010 Cup.
The use of vuvuzelas during the games was approved by Fifa last year after a presentation by the organising committee.