Junta-ruled Myanmar is set to dominate a meeting of Southeast Asian nations in Indonesia that started Tuesday, after an airstrike on a village last month reportedly killed at least 170 people.
Myanmar has been ravaged by deadly violence since a military coup deposed Aung San Suu Kyi's government more than two years ago and unleashed a bloody crackdown on dissent.
The Association of Southeast Asian Nations (ASEAN) -- long-decried by critics as a toothless talking shop -- has led diplomatic attempts to resolve the crisis.
But those efforts have been fruitless, as the junta ignores international criticism and refuses to engage with its opponents, which include ousted lawmakers, anti-coup "People's Defence Forces" and armed ethnic minority groups.
An air strike on a village in a rebel stronghold last month that reportedly killed about 170 people sparked global condemnation and worsened the junta's isolation.
It also fuelled calls for ASEAN to take tougher action to end the violence or risk being sidelined.
That pressure increased Sunday after a convoy of vehicles carrying diplomats and officials coordinating ASEAN humanitarian relief in Myanmar came under fire.
Few details have been released about the shooting in eastern Myanmar's Shan State, but a foreign diplomat in Yangon said diplomats from the embassies of Indonesia and Singapore were in the group.
Singapore confirmed two staff members from its embassy in Yangon were in the convoy but unharmed.
"Singapore condemns this attack," its foreign ministry said late Monday.
Indonesia, the ASEAN chair this year, has not yet said if its diplomats were in the vehicles.
- 'Feckless' -
The foreign ministers held talks Tuesday while their countries' leaders were scheduled to meet Wednesday and Thursday.
Ahead of the arrival of officials in Labuan Bajo, the army deployed more than 9,000 personnel and warships to the small fishing town that serves as the entrance to Komodo National Park, where tourists can see the world's largest lizards.
In her opening remarks Tuesday, Indonesian Foreign Minister Retno Marsudi said the ministers had already discussed "the implementation" of the peace plan, but she did not elaborate.
A Southeast Asian diplomat told AFP that Sunday's shooting "raises the urgency of Myanmar as a key discussion point at this summit".
The US State Department said it was "deeply concerned" about the shooting and urged the junta to "meaningfully implement the Five-Point Consensus".
Myanmar remains an ASEAN member but has been barred from top-level summits due to the junta's failure to implement the peace plan.
Marsudi said Friday that her country was using "quiet diplomacy" to speak with all sides of the Myanmar conflict and spur renewed peace efforts.
ASEAN has long been criticised for its inaction, but its initiatives are limited by its charter principles of consensus and non-interference.
Former Indonesian foreign minister Marty Natalegawa said the bloc was "being tested whether it is relevant and able to address this issue".
But US-based analyst Zachary Abuza said the group was unlikely to offer more than "another milquetoast statement of condemnation" despite Sunday's attack.
"Had a diplomat been killed, there would have been more pressure on the organisation to do something, but frankly they've been so feckless in the past two years that it's hard to see them actually acting in a meaningful way," Abuza told AFP.
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© Agence France-Presse
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