Ahead of Blinken's trip, the United States' top diplomat for East Asia, Daniel Kritenbrink, told reporters there had been "virtually zero progress" in efforts to get Myanmar's junta to reduce violence, free political prisoners and talk to the democratic opposition.

Southeast Asian leaders will meet in Laos this week as Myanmar's civil war and mounting tensions in the South China Sea risk corroding the ASEAN grouping's central role in the region.

A US delegation led by Secretary of State Antony Blinken will raise concerns with Asian leaders over growing South China Sea tensions and the civil war in Myanmar at a regional summit in Laos.Blinken’s attendance at the Association of Southeast Asian Nations summit this week is one of his last opportunities to convey Washington’s regional interest in person ahead of the November presidential election in the US.