Two Turkish journalists have been arrested on charges of espionage and aiding an armed terrorist organization, according to Turkey’s Anadolu Agency. Can Dundar, editor-in-chief of daily newspaper Cumhuriyet, and Erdem Gul, the paper’s Ankara bureau chief, were arrested Thursday night after three hours of questioning in court. They are accused of revealing confidential state security information for political or military espionage and aiding a terrorist organization. International organization Reporters Without Borders ranks Turkey 149th out of 180 countries in terms of press freedom. Over two thousand protesters gathered Friday in Istanbul to decry the arrests. The United States also said it was "very concerned" by the arrests.