The United Nations special envoy for Myanmar pleaded with the Security Council Friday to do more to halt the violence there after the death of about 50 peaceful protesters against the military’s coup.

Christine Schraner Burgener told a closed UN Security Council meeting that trust in the world body is “waning,” saying she receives about 2,000 messages every day calling “for international action to reverse a clear assault on the will of the people of Myanmar and democratic principles.”