Ethiopia accuses Eritrea of preparing for war as Red Sea tensions rise
Ethiopia has been rallying support to regain access to the Red Sea, causing alarm in Eritrea as it took control of the coastline at independence in 1993.
Eritrea has not yet commented on the letter, but its relationship with Ethiopia has become increasingly strained in recent months.
Ethiopia's accusation is contained in a letter sent by its Foreign Minister Gedion Timothewos to UN chief Antonio Guterres, warning that the collusion had become "more evident over the past few months".
Ethiopia has accused Eritrea of preparing to wage war
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