Aden, July 14, 2019, SPA -- The UN Secretary-General's Special Envoy to Yemen Martin Griffith urged the Yemeni government and the Iran-backed Houthi militias to implement the prisoners and detainees agreement signed in Stockholm. This came in a brief statement on Griffith's Twitter, as he also stressed that the UN opposes the use of the death penalty in all circumstances. --SPA 21:48 LOCAL TIME 18:48 GMT 0029 www.spa.gov.sa/w1137941