Amnesty International on Thursday called for an investigation into the massacre of more than 400 Amhara civilians in Ethiopia's Oromia region last month, citing eyewitnesses who blamed a local rebel group for the killings.
The Oromo Liberation Army (OLA) has denied the accusations, saying government-allied militias were responsible for the 18 June massacre in the west of Ethiopia's most populous region, which has seen an increase in violence in recent months.
