About 340 people were killed in an attack in the western part of Ethiopia's Oromiya region earlier this month, the Prime Minister's spokeswoman said on Thursday, blaming a militia formerly allied to an opposition party.
Oromiya, home to Ethiopia's largest ethnic group and others, has experienced unrest for many years, rooted in grievances about political marginalization and neglect by the central government.
On June 18 gunmen killed at least 200 people in the Gimbi district of Western Wollega Zone, according to two local witnesses who helped bury the bodies