From left, Houthi representative Abdul-Qader el-Murtaza, the UN's Hans Grundberg, and Yemen's Yahya Mohammed Kazman after a detainee-exchange meeting. AP
From left, Houthi representative Abdul-Qader el-Murtaza, the UN's Hans Grundberg, and Yemen's Yahya Mohammed Kazman after a detainee-exchange meeting. AP

Yemen prisoner swap expected on Friday, government official says