PM Abiy Ahmed makes announcement during a Moscow summit as Ethiopia battles armed groups in Tigray and Amhara. Ethiopia has received 12 Russian Su 35 jets and plans four S 400 batteries, raising questions over defence costs as Addis Ababa restructures debt and rebuilds foreign exchange reserves. Ethiopia has announced the arrival of 12 advanced Russian Su-35 fighter jets, marking a major expansion of its military airpower as renewed fighting in Tigray.