UNITED NATIONS: The UN envoy on Myanmar implored the Security Council to take action Wednesday in the Asian nation's escalating crisis, warning of the risk of civil war and an imminent "bloodbath" as the junta violently represses pro-democracy protests.

More than 520 people have died in daily demonstrations since the military overthrew elected leader Aung San Suu Kyi on February 1, halting Myanmar's decade-old experiment in democracy.

"I appeal to this Council to consider all available tools to take collective action and do what is right, what the people of Myanmar deserve and prevent a multi-dimensional catastrophe," special envoy Christine Schraner Burgener told the closed-door session, according to remarks obtained by AFP.

She said she remained open for dialogue with the junta but added: "If we wait only for when they are ready to talk, the ground situation will only worsen. A bloodbath is imminent."

Barbara Woodward, the UN envoy from Britain, which requested the meeting, told reporters the Security Council was "united in its condemnation" and was discussing "a range of measures at our disposal."

But China, considered Myanmar's main ally, ruled out sanctions.

"One-sided pressure and calling for sanctions or other coercive measures will only aggravate tension and confrontation and further complicate the situation, which is by no means constructive," China's ambassador, Zhang Jun, told the meeting, according to a statement.

The session came after Suu Kyi's legal team earlier Wednesday said the ousted leader appeared to be in good health despite two months of detention.

Suu Kyi, 75, has not been seen in public since she was deposed but a member of her legal team, Min Min Soe, was summoned to a police station in the capital Naypyidaw for a video meeting with her.

Suu Kyi is facing a raft of criminal charges, and conviction could see her barred from office for life.