J IH ADIST AND E T H NO -NAT IONALIST T E R R OR ISM Increasing problems with jihad veterans and released prisoners The authorities will be increasingly preoccupied with the question of how to deal adequately with jihad veterans and released prisoners, who might still be radicalised. Released prisoners who are Swiss or who for a variety of reasons cannot be returned to their home country will present a particular challenge. Moreover, jihad veterans and released prisoners with a valid residence document can move freely in the Schengen area. New means of terror Jihadist militias in Syria and Iraq have employed drones as well as chemical agents; both methods are often recommended in their propaganda. Uncovered plans for attacks using hydrogen sulphide in 2017 in Australia and for attacks using toxins in 2018 in Germany and Italy highlight the fact that attacks employing chemical or biological agents are a realistic scenario; attacks using radioactive material are less likely. Attacks using explosives, drones, simple chemicals such as toxic gases or other poisonous substances require relatively little outlay and resources. Instructions for their manufacture and use are easy to find. In addition, new technologies such as Jihad-motivated travellers SIT UAT ION R E PORT 2 0 1 9 | FIS 45