Naidoo stressed that "the government's actions undermine an event that depends on a plurality of views" and denounced that "over the past year, the crackdown on freedom of expression in civil society in Vietnam has intensified".
Vietnamese authorities accused Stothard of threatening national security for planning to speak on the increasing restrictions facing civil society around the world
The two bans have cast a shadow on the opening of the World Economic Forum, which takes place in Vietnam for the second time has a focus on innovation and employment challenges of the fourth industrial revolution.
The event is attended by more than 1,000 participants from 43 countries, including Asean heads of state and government.
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