United Nations secretary-general, António Guterres has urged the world community to make sure Myanmar’s coup fails.
“We’ll do everything we can to mobilise all the key actors of the international community to put enough pressure on Myanmar to make sure that this coup fails,” he said.
“It’s absolutely unacceptable to reverse the result of the elections and the will of the people.
“I hope that it’ll be possible to make the military in Myanmar understand that this is not the way to rule the country and this is not the way to move forward.”
The UN Security Council is discussing a possible statement, but China is expected to block any form of words which condemns the coup.
Elected leader Aung San Suu Kyi was detained when the army seized power.
Police in Myanmar filed charges against Ms Suu Kyi, who has been remanded in custody until 15 February.
Neither Ms Suu Kyi nor deposed President Win Myint have been heard from since the takeover.
The coup, led by armed forces chief Min Aung Hlaing, has seen the installation of an 11-member junta.
The military, which has declared a year-long state of emergency, sought to justify its action by alleging fraud in last November’s elections, which Ms Suu Kyi’s National League for Democracy (NLD) won decisively.
Facebook services in Myanmar were disrupted on Thursday amid reports the military had ordered telecom companies to block the social media platform.
The company confirmed the disruptions, urging “authorities to restore connectivity so that people in Myanmar can communicate with their families and friends and access important information”.
Over the past days, activists had set up Facebook pages to co-ordinate opposition to the coup.