Aden, Ramadan 06, 1439, May 22, 2018, SPA -- Yemeni Ministry of Human Rights has strongly condemned firing of Katyusha rockets by Iranian-backed Houthis militias, at Marib city center, killing four civilians and injuring 22 others. "The firing of rockets, at civilians and residential areas, is a crime against humanity and a flagrant violation of international law, including Security Council resolutions", the ministry said, in a statement reported by the official Yemeni News Agency. --SPA 16:24 LOCAL TIME 13:24 GMT 0012 www.spa.gov.sa/w692277