City has seen a surge of violence in recent weeks Separatists and government both part of Arab coalition battling Iran-aligned Houthis ADEN: A suicide bomber on a motorcycle killed six southern separatist fighters on Friday on the outskirts of the Yemeni city of Aden, the site of a surge of violence that had complicated the near five-year-old war and undermined peace efforts. Daesh claimed responsibility for the assault on the patrol from the Security Belt group, part of a separatist front fighting Yemeni government forces for control of the city, the extremist group"s Amaq news agency said. The separatists and the government are both part of an Arab coalition battling the Iran-aligned Houthis, which took over most of Yemen’s cities in 2014.