"Dozens of vehicles are blocking key roads across Myanmar's main city Yangon, in what appears to be a new tactic employed by protesters. It comes as tens of thousands of people gather downtown, in what organisers hope will be the biggest protest yet. The UN special rapporteur for Myanmar, also known as Burma, has warned of potential violence. Demonstrators are demanding the release of their elected leaders following a 1 Feb military coup - Aung San Suu Kyi and other leaders have been detained by the military..."