In Yemen, 12 people were killed and over 130 wounded in the heavy fighting flared up again in southern port city of Aden today after clashes on Sunday. <br/>'<br/>Violence first erupted on Sunday when a deadline issued by the separatists for the government to resign expired. <br/><br/>The separatists are backed by the United Arab Emirates, a key partner in the Saudi-led coalition supporting Yemen's internationally recognized government in its war since 2015 against the country's rebels, known as Houthis.<br/>'<br/>Yemen's Prime Minister Ahmed Obaid Bin Daghar described the separatists' move as a coup. <br/><br/>Meanwhile, coalition spokesman Col Turki al-Malki said the coalition's priority is to deliver humanitarian aid, declining to comment on the violence. <br/><br/>The United Nations says that Yemen is facing the world's worst humanitarian crisis. <br/><br/>