The Freedom and Justice Party (Muslim Brotherhood) and probably the Al Nour Party (Salafist Calling) interfered with what was to be a non-Islamist protest.
And the Building and Development Party - who are affiliated with the al-Gama’a al-Islamiyya (once considered terrorists by the US) - they’re led by the Al Nour Party aka Salafists. All of them are under the umbrella of the Islamic Bloc. http://en.wikipedia.org/wiki/Building_and_Development_Party