SINGAPORE, March 1 (CNA) - Singapore's Minister of Foreign Affairs Vivian Balakrishnan on Monday (Mar 1) called on Myanmar's military to stop the use of lethal force on civilians and the immediate release of State Counsellor Aung San Suu Kyi and other political detainees.

At least 18 people died on Sunday, said the United Nations human rights office, as Myanmar authorities cracked down on protests against the military coup.

Speaking during the Ministry of Foreign Affairs' (MFA) Committee of Supply debate, Dr Balakrishnan said the recent developments in Myanmar are of "grave concern" to Singapore and the larger Association of Southeast Asian Nations (ASEAN) family.

"The immediate priority is to halt all acts of violence and the use of lethal force, and to step back from a rapidly deteriorating situation," said Dr Balakrishnan.

He highlighted a "significant escalation in violence" on Sunday across cities in Myanmar.

"Security forces shot at civilians with live rounds, rubber bullets, stun grenades, and tear gas - many deaths and injuries were caused," said the Foreign Minister.

"We are appalled by the use of lethal force against civilians," said Dr Balakrishnan, adding his condolences to the families of those who died.

Singapore "strongly reiterates" that the use of lethal weapons against unarmed civilians is "inexcusable in all circumstances", said Dr Balakrishnan.

"We call on the Myanmar military authorities to exercise utmost restraint, to desist from the use of lethal force, and to take immediate steps to de-escalate the situation in order to prevent further bloodshed, violence and death," he added.

Prolonged instability in Myanmar would have "serious consequences" for the country, ASEAN, and across the region, he said.

He called on all parties in Myanmar to engage in discussions and to negotiate "in good faith", and to pursue long-term peaceful political solutions for them to "achieve national reconciliation, including ... to find a way to get back to the path of democratic transition".

"We believe this can only begin if President Win Myint, and State Counsellor and Foreign Minister Aung San Suu Kyi, and the other political detainees are immediately released," said Dr Balakrishnan.