VIENTIANE, Laos (Reuters) -Southeast Asian leaders met in Laos on Wednesday for a summit expected to seek ways address the worsening civil war in Myanmar, with Thailand calling for heightened engagement ahead of a planned election by the country's embattled military rulers.

Southeast Asian leaders are meeting at an annual forum that will focus on the civil war in Myanmar and territorial tensions in the South China Sea, two challenges that have long tested the bloc's credibility.

President Yoon Suk Yeol arrives in Laos for the ASEAN Summit, focusing on Myanmar's conflict and South China Sea tensions.