Moscow, Aug. 10 -- UN Secretary-General Antonio Guterres called on Yemeni parties to stop fighting amid violence in the city of Aden, where the country's internationally-recognized authorizes currently seat. The Yemeni conflict between the government and the rebel Houthi movement has been ongoing since 2015. However, this week, separatists supporting the Southern Transitional Council engaged in clashes with pro-government forces. "The Secretary-General is deeply concerned by the violent clashes in Aden over the past several days, including in the vicinity of the Presidential Palace and the international airport. He urges the parties to cease hostilities and to ensure compliance with international humanitarian law and international human rig...