The photograph was posted on Twitter today and shared by Selahattin Demirtas, leader of Turkey's pro-Kurdish political party.
The ministry statement said claims of abuse would be investigated fully. It said Turkey was determined to press ahead with its fight against Kurdish rebels "within the principles of a state ruled by laws."
Violence between the autonomy-seeking rebels of the Kurdistan Workers' Party, or PKK, and the Turkish security forces reignited this summer, shattering a fragile peace process with the Kurds.
