Indonesia, Malaysia, the Philippines and Singapore pushed for a harder stance against Myanmar junta leader Min Aung Hlaing at a "tense" meeting that decided to exclude him from a regional summit this month, four people with knowledge of the talks said.

Southeast Asian ministers were divided between sticking to a tradition of non-interference and the need to retain credibility by sanctioning the coup leader, who has led a bloody crackdown on dissent since seizing power from Myanmar's civilian government on...