<p>(RSF/IFEX) - Reporters Without Borders calls for the immediate release of Pham Minh Hoang, a blogger with French nationality who teaches mathematics at the Ho Chi Minh City Polytechnic School. He has been held incommunicado since his arrest on 13 August 2010 for allegedly violating article 79 of the criminal code, which refers to attempts to overthrow the government.</p>