United Nations chief Antonio Guterres has said there is a “real opportunity” for an end to more than 14 months of fighting between the Ethiopian government and Tigrayan forces, following a call with the African Union’s special envoy, Olusegun Obasanjo. Al Jazeera reports though that despite his mention of optimism, Guterres also warned that “ongoing military operations in some parts of Ethiopia remain a challenge to the peace process and sour the confidence-building measures that we hope are being taken by all parties in the conflict.” He called on all parties “to move rapidly towards cessation of hostilities,” and said the UN watches the African Union-led mediation efforts with great hope.