The investigative news organization, WikiLeaks, claims to have broken encryption of a classified US military video that shows two Reuters journalists were killed in an attack in Baghdad in 2007.

The video shows US Apache helicopters in a Baghdad suburb, opening fire on a group of men.

Wikileaks identifies two of them as Reuters photographer Namir Noor-Eldeen and driver Saeed Chmagh. The helicopter then fires on a van as its occupants rush to rescue the wounded.

The video also shows ground troops carrying two injured children from the van. According to WikiLeaks, at least 12 people died in the gunfire.

The organization did not reveal how they obtained the video, but says the material is authentic.

Julian Assange, Founder of Wikileaks.org, said, "This Apache helicopter was firing 30mm cannon shells, normally used for armored PC operations and you can see, these zoom lenses are quite extraordinary and the behavior of the pilots is like they're playing a computer game and their desire appears to be that they want to get high scores on that computer game."