Mr Pronk has previously used his blog to criticise the peace agreement saying it needed to be amended to rectify a flaw.
Officials in Mr Pronk's office were not available for comment.
UN officials in New York have previously said Mr Pronk's views on the website were personal, adding there were no rules appertaining to blogs by senior officials. Sudan is a notoriously difficult place for diplomats to work as the government has a reputation for manipulation and saying one thing while doing another.
BBC World Service broadcasts to Juba in Southern Sudan and surrounding areas in Arabic on 90.0 FM and in English on 88.2 FM. In Northern Sudan: Khartoum 91.0 FM, Al Ubayyid 91.0 FM, Port Sudan 91.0 FM and Wad Madani 91.5 FM.
“Violence will bring no victory. For the sake of the Darfur civilians, all parties to the conflict have to stop resorting to violence. This is the absolute priority.” - Luis Moreno-Ocampo, Prosecutor of the International Criminal Court, 05 June 2009
"APPREHENSION" by Rob Rooker. Painted on a wall in Maridi, Sudan. The image is of a young Nuer boy looking up among a crowd of people. Click on image for more details. Cards & prints of Rob's paintings can be purchased online at Imagekind.com