The BBC has taken note of military documents that allegedly show that 54 Afghan civilians were "killed in suspicious circumstances" by British special forces during a six-month operation in Helmand province, in southwestern Afghanistan, in 2010-2011.

In the documentary "SAS Death Squads Exposed": A British War Crime? "

the digging reporters are looking for answers as to whether the deaths may have been pure executions.

"Kill or capture"

The British Special Forces issued, among other things, "Kill or capture" raids (see explanation in the video) where the goal was to identify Taliban leaders and then kill or capture them in their homes.

But soldiers who took part in the operation tell the BBC that unarmed people were killed, as even high-ranking officials knew.

The units are also said to have competed among themselves in how many people they could kill.

- Too many people were killed in the night trees and the explanations did not go together.

When someone is captured, it can not end with them being found dead, an anonymous official tells the BBC.

Suspicions of intentional executions were investigated by the British military, but no action was taken.

General Mark Carleton-Smith, the then commander of the forces, had also received information that units were being accused of extrajudicial executions, but did not notify the military police, according to the BBC.

The British Ministry of Defense rejects the BBC's investigation and says that these are "unfair conclusions about suspicions that have already been investigated", writes AP.

According to the ministry, two independent investigations have looked at the efforts of the special forces in Afghanistan and concluded that there are no suspicions of crime.

Investigation is promised after criticism

Following the review, criticism has been leveled at both the military and the so-called "kill or capture" strategy.

One of the former military chiefs told the BBC that he had "initiated a detailed investigation" into the data, if he had still been in service.

"Kill or Capture" was introduced in 2007 by the US military in Iraq, but has since been used extensively by a number of Western troops in Iraq, Syria and Afghanistan.

- Many times this method has led to more civilians being killed than terrorists, says Anders Fänge.