The 33-year-old former Malmö resident was sentenced last summer to life imprisonment for serious war crimes and terrorist offenses in the district court. The crimes concern Krayem's involvement in the brutal execution of a Jordanian fighter pilot in Syria during Christmas 2014.
He is already serving a 30-year prison sentence for involvement in terrorist attacks in Paris 2015 and he has been sentenced to life imprisonment in Belgium after the terrorist attack in Brussels 2016.
