Yemen ' s Houthis have confirmed in writing to the UN secretary general their commitment to UN resolutions aimed at ending the country ' s conflict. In a letter obtained by the BBC, Houthi representatives pledge to adhere to a seven-point peace plan brokered by the UN during talks in Muscat, Oman. The letter follows a verbal commitment to the resolutions issued last month. The UN estimates nearly 4,900 people, including 2,355 civilians, have been killed in the conflict in Yemen. Addressed to Ban Ki Moon, the letter commits to the seven Muscat principles, which include a ceasefire, the removal of armed militias from the cities and the return of the government to the capital, Sanaa. Yemen's President Abdrabbuh Mansour Hadi has insisted Houthi fighters pull back from territory seized over the past year before an agreement can be reached.