Vietnam's government is to decide policy in managing free internet-based telecom tools like Viber, Line and Whatsapp, Prime Minister Nguyen Tan Dung said on Friday, a move bound to increase concerns about Communist Party censorship. State media said the government might "ban" free messaging services because of the harm done to network providers. Vietnam has repeatedly come under fire for curbs on free speech and harsh treatment for bloggers who dare to criticize the one-party regime.