A 45-year-old Syrian man with a Swedish residency permit has been arrested for alleged war crimes in northern Syria, officials said Tuesday.
Haisam Omar Sakhanh, was arrested on Friday and remanded in custody in Orebro, some 200 kilometers west of Stockholm.
He was detained on Monday night as part of an investigation into acts committed in the province of Idlib but the prosecutor gave no details of the alleged crimes.
The Swedish daily Expressen said he is suspected of having participated in the execution-style murder of seven men in Idlib in April 2012.
A video, originally published by The New York Times in 2013, graphically shows the execution of the men with their hands tied behind their backs. It is alleged that Sakhanh was one of the executioners.
The video, which was also posted by Expressen, shows a man suspected of being Sakhanh holding a Kalashnikov assault rifle.
The men are bent forward on the ground and at the request of a leader, they were executed.
"During war you have the right to kill in a way that you wouldn't have the right to do when you're not in war," said Kristina Lindhoff Carleson, the prosecutor handling the case, told AFP.
"Still, there are rules that must be followed according to international law. You can't just do any destructive or murderous thing."
Sakhanh was granted official residency in Sweden on October 30, 2013. Before moving to Sweden, he had lived in Milan, Italy since 2002, where he worked as an electrician, according to Italian media reports.
After the civil war in Syria broke out in 2011, Sakhanh became a leading opposition figure who actively protested against the Syrian regime's abuses, according to Italian newspaper Corriere della Sera.
In February 2012, he was arrested by Italian police after a demonstration at the Syrian embassy turned into a riot. Exiled Syrians stormed the embassy and guards were beaten, according to the newspaper.
Sakhanh was released by police after questioning and then disappeared.
AFP contributed to this report