Army Chief General Ashfaq Pervaiz Kayani has ordered an inquiry into an internet video showing men in military uniforms executing six young men in civilian clothes.
In a statement, General Kayani said a military board headed by a Major General would conduct the investigation to determine the authenticity of the five-and-a-half minute video.
The video shows the young men blindfolded and being lined up against a wall. Gunfire is then heard, the men crumple and a soldier moves in to shoot each body at short range.
The video, yet to be verified, appears to have been taken in the Swat Valley.
Pakistan Army has dismissed allegations of extra-judicial killings and termed the videos claiming to show soldiers gunning down blindfolded men as fake.