U.S. Department of State spokeswoman, Marie Harf announced Friday that her country condemns Houthis' constitutional declaration. Harff added that the United States will continue to work with anti-terrorism forces in Yemen. The U.N. spokesman, Stephane Dujarric said that the international organization is concerned about the situation in Yemen after the dissolution of parliament and the formation of a new presidential council. "This power vacuum is a great concern to us, the UN Secretary-General, Ban Ki-moon and all those who are concerned with Yemen, follow the situation very closely", Dujarric says. Meanwhile, Hundreds of Yemenis has demonstrated Friday in Aden, Southern Yemen to announce their rejection to the constitutional declaration issued by the Yemen's Houthi group. Also, Ma'rib tribes rejected Houthis' constitutional declaration, calling on the Gulf Cooperation Council to not abandon Yemen. The local authorities in Hadhramaut governorate announced its rejection to the Houthi's declaration, saying that they will not deal with it. Earlier today, Houthi group announced that they had dissolved parliament and installed a "presidential council" to run the country in the face of a power vacuum. In a statement issued by the group they announced a constitutional declaration that consists of 16 articles including the formation of a new parliament of 551 members to replace the dissolved parliament. The declaration also included a presidential council of five members determined by the Parliament, which should be followed by the formation of the government that will be selected by the Presidential Council of Yemen. The five-member presidential council will form the transitional government to govern for two years.