Police found a USB stick containing films showing the killings during a search of one of their homes, a Swedish district court was told.
In a video shown in court by the prosecutor, masked men stood around three men on their knees with their hands tied behind their backs.
Two of the victims have their throats slit. The head of one is cut off and held up for display. Their captors — including the men identified by the prosecutor as the two Swedes — are seen cheering.
The court argued that since the killings and the video intended to seriously intimidate the population of Syria, the two men’s actions should be considered a terrorist crime.