The number is confirmed also by the Swedish Intelligence Service Säpo. However, there are no further details about where in Sweden these people travelled from.
"we do not speak about individual cases and it is because it is not possible to get completely official figures. We may have information from social media, open media or intelligence services, but to get completely certain information from the country Syria is currently not possible, and that is why we do not say anything about individuals," Säpo's press spokesperson Sirpa Franzen told Nerikes Allehanda.
Previously, Säpo had said some 25-30 people from Sweden have died fighting for IS.
The newspaper's main offices are located in Örebro, from where up to twelve people - according to the paper - have travelled to Syria to fight for IS. The paper also notes that there has been information in social media that three young men from Örebro recently have been killed while fighting for IS in Syria.