Two senior US envoys have held separate talks with Myanmar's Prime Minister Thein Sein and detained pro-democracy leader Aung San Suu Kyi. The visit of US Assistant Secretary of State Kurt Campbell and his deputy is the highest level contact between the two governments for more than a decade. <br/>Mr Campbell met the Prime Minister in the capital, Naypyitaw, before flying to Rangoon to meet Ms. Suu Kyi. No details of either set of talks have been released. <br/>The visit comes weeks after the US announced it would engage with Myanmar's military junta in an attempt to promote reform. <br/>