Technological progress may threaten freedom of expressionListen / Advances in technology may threaten freedom of expression across the world, the UN's cultural organization, UNESCO has warned.
It says the "increasing control" of online content by Internet companies, such as search engines and social media networks, threatens transparency in the free flow of information.
Launching the report, World Trends in Freedom of Expression and Media Development, UNESCO's Director-General Irina Bokova, appealed for renewed commitment to support press freedom.
She said national legislative frameworks need to be strengthened and the capacity of journalists built.
She added that media independence had to be supported through the promotion of "professional standards and self-regulation."
Daniel Dickinson, United Nations.