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Ethiopia says it has thwarted a planned attack by an Eritrean-backed group on its vast Grand Ethiopian Renaissance Dam project.
Security forces killed 13 and captured seven of the alleged attackers, who were from an Eritrean rebel group, government-affiliated website Fana Broadcasting Corporation reports .
The rebel group, from the Benishangul Gumuz ethnic minority, operates close to the border with Sudan in the western Benishangul Gumuz Regional State, where the dam is under construction, Fana adds.
The vast project is about 50% complete and has been a source of regional tension.
Egypt has long suspected it will reduce its share of the Nile water.
Ethiopia and neighboring Eritrea have a long history of border disputes.
