London, September 25 (RHC)-- A legal proceeding has been initiated against British Prime Minister David Cameron over his decision to target Daesh or ISIL terrorists in Syria.

Green party lawmakers, Caroline Lucas and Jenny Jones, are working with human rights charity Reprieve to take the first step toward a judicial review of the attack on Syrian soil. That comes after Cameron earlier this month revealed that British forces killed three Daesh terrorists, including two young Britons, in the northern Syrian city of Raqqah in a drone airstrike.

The August 21st airstrike killed 21-year-old Reyaad Khan from the city of Cardiff, 26-year-old Ruhul Amin from Aberdeen and another terrorist who was not from Britain.

The attack went ahead despite parliament voting against strikes in 2013. The British premier justified the drone attack saying those killed were plotting against the UK and that they could not be eliminated by any other means.

In a letter to the defense secretary and attorney general, lawyers for the Green politicians have challenged the British government’s stance and say the attack were illegal under both domestic and international law.