N human rights experts said on Wednesday.

The four were convicted of killing Iraqi civilians while working as contractors.

In 2007, Nicholas Latin was convicted of first degree murder, while Paul Sloth, Evan Liberty and Dustin Heard were convicted of voluntary and attempted manslaughter over the incident, in which U.

S contractors opened fire in a Baghdad square and killed 14 unarmed Iraqi civilians.

The four contractors worked for the private security firm Blackwater, which is owned by the brother of Trump's education secretary.

The pardons were strongly criticized by many in the United States.

General David Petraeus and Ryan Crocker, respectively, commander of US forces and U.

S ambassador in Iraq at the time of the incident, called Trump's pardons quote hugely damaging an action that tells the world that Americans abroad can commit the most heinous crimes with impunity.

The U.