Southeast Asian nations have made "no significant progress" on implementing a peace plan aimed at ending bloodshed in Myanmar, Indonesian President Joko Widodo has said as the Association of Southeast Asian Nations (ASEAN) summit ended.

Escalating violence in junta-ruled Myanmar dominated the three-day meeting on the Indonesian island of Flores.

The regional bloc has spearheaded diplomatic efforts to resolve the crisis, though its mostly fruitless attempts to enact a five-point plan agreed upon with Myanmar two years ago have fuelled warnings the group risked irrelevance.