New York ? U.S. military police stacked Iraqi prisoners’ bodies in a pyramid and attached wires to one detainee to convince him he might be electrocuted, according to photographs obtained by CBS News that led to criminal charges against six American soldiers.

CBS said the photos, shown Wednesday night on “60 Minutes II,” were taken late last year at Abu Ghraib prison near Baghdad, where American soldiers were detaining hundreds of prisoners captured during the invasion and occupation of Iraq.

In March, the U.S. Army announced that six members of the 800th Military Police Brigade faced court martial for allegedly abusing about 20 prisoners at Abu Ghraib. The charges included dereliction of duty, cruelty and maltreatment, assault and indecent acts with another person.

In addition to those criminal charges, the military has recommended disciplinary action against seven U.S. officers who helped run the prison, including Brig. Gen. Janice Karpinski, the commander of the 800th Brigade, a senior military official said Wednesday in Baghdad.

The investigation recommended administrative action against several of the commanders, which could include punishments up to relieving them of their commands, said the official, speaking on condition on anonymity.

When the abuse charges were first announced, U.S. military officials declined to provide details about the evidence. But on Wednesday, at a news briefing in Baghdad, Brig. Gen. Mark Kimmitt said the investigation began in January when an American soldier reported the abuse and turned over evidence, including photos.

One picture, according to CBS, shows an Iraqi prisoner who was told to stand on a box with his head covered and wires attached to his hands. CBS said the prisoner was told that if he fell off the box, he would be electrocuted.

In another photograph, CBS said, prisoners’ bodies were stacked in a pyramid, and one man had a slur written in English on his skin.

The Army ordered an investigation into the actions of 17 soldiers from the 800th Brigade, which is based in Uniondale, N.Y. Ten were investigated for criminal actions.

In an interview with CBS correspondent Dan Rather, Kimmitt said the photographs were dismaying.

“If we can’t hold ourselves up as an example of how to treat people with dignity and respect, we can’t ask that other nations do that to our soldiers,” Kimmitt said.