The Taliban have released a video they say shows insurgents preparing for an attack on a NATO base earlier this month that killed two Marines and destroyed six fighter jets, The Associated Press reports.

The footage released on Monday, Sept 24 shows men wearing U.S. Army uniforms as they practice cutting through a chain-link fence and charging through the opening. One man indicates targets with a pointer and a whiteboard with drawings of planes.

He speaks Pashtun, a major language in southern Afghanistan and parts of Pakistan. Words on the whiteboard are written in Urdu, a language more common in Pakistan.

A Taliban spokesman emailed the link to the video to the media but it was not possible to verify the authenticity of the footage. Nothing in the video indicates when or where it was filmed, AP says.