Video evidence has emerged showing Pro-Biafran demonstrators in Abia State being attacked by the Nigeria military last week, leaving one man dead and several others bloodied.
The protesters, including women, were marching at a high school when they were met by state security, including military and police, who tear-gassed and beat them.
They were then forced into police vans and trucks, where the violence against them continued.
Pro-Biafra protesters have repeatedly clashed with the federal government in parts of the southeast.
Nnamdi Kanu, the leader of the Indigenous Peoples of Biafra (IPOB) and Director of Radio Biafra, was arrested by the Department of State Services last year. He is currently undergoing trial and remains in custody. His supporters have repeatedly called for his release.