"The fight for control of Myanmar has now officially arrived at the United Nations. In a letter seen by CNN, Myanmar's UN Ambassador Kyaw Moe Tun has told the international body that he still represents Myanmar, after making an impassioned speech last week rejecting the country's military takeover. Meanwhile, a deputy ambassador to the UN from Myanmar will claim that he is now the man the military authorities want to represent the country. Both sides have sent the UN letters to make their case on official letterhead. Myanmar's democratically elected government was overthrown last month in a military coup that saw civilian leaders including Aung San Suu Kyi detained. For weeks, thousands of people in the country have come out to protest against the coup, risking deadly violence and arrest by security forces. "The perpetrators of the unlawful coup against the democratic government of Myanmar have no authority to countermand the legitimate authority of the President of my country," Ambassador Kyaw Moe Tun wrote in his letter to the UN. But the Myanmar foreign ministry is backing a deputy ambassador to take control of the country's UN representation, according to UN spokesman Stephane Dujarric. "It's a unique situation we have not seen in a long time," Dujarric told reporters on Tuesday of the dueling claims. He added that the UN is "trying to resolve things as quickly as possible." Myanmar's military leaders first announced Kyaw Moe Tun's removal over the weekend, after he called on UN members to use "any means necessary" to help restore the country's civilian leadership. "We need further strongest possible action from the international community to immediately end the military coup, to stop oppressing the innocent people, to return the state power to the people and to restore the democracy," he told the UN on Friday. Kyaw Moe Tun said he was delivering the speech on behalf of Suu Kyi's government, and flashed the three fingered "Hunger Games" salute used by protestors on the streets of Myanmar, prompting a rare round of applause from his UN colleagues at the end. The new US ambassador to the UN, Linda Thomas-Greenfield, praised the envoy's "courageous" remarks..."