If they are not in uniform, they are spies under the Geneva convention. Interrogate them, give them one last smoke and then a 9mm between the eyes. Better yet, hang 'em high. Let them dangle from the bridge in Falluga!!!!
Hang 'em with dull, rusty wire that decapitates as it slowly strangles. Then put all the dead bodies in a pit of pig fat, and let 'em rot for Al Jazeera TV and the "Arab Street" to see.