The military has launched an investigation after a rights group accused the army of carrying out executions during a recent operation in which it said it had killed nearly 150 militants.
The army said in February it had killed 146 militants in response to an attack on civilians.
The operations were part of a broader response to worsening Islamist and interethnic violence across northern Burkina since last year.
Human Rights Watch said later that some of those killed were executed in front of their families.
John Mendy reports.