Rights watchdog Amnesty International has called on Ethiopian authorities to launch an impartial investigation into last month’s killing of more than four hundred members of an ethnic group that is a minority in the country’s Oromia region.

The killings showed the attackers’ utter disregard for human life.

The violence in Tole area of Gimbi district saw farming villages populated by ethnic Amharas targeted.

It has been blamed on the armed group, Oromo Liberation Army, but authorities have also been criticised for failing to respond fast enough to the violence.