The arrests took place in different countries over several weeks. Brought together in Europol’s 2 October update, they describe an investigation into how serious violence may be arranged across borders, from the people suspected of organising attacks to those allegedly recruited to carry them out.

The agency says the operation targeted people suspected of arranging attacks and recruiting perpetrators across borders. Its account includes a Paris arrest on 29 September and earlier actions in Spain and Morocco, with links to investigations involving Sweden, Denmark and Norway.

The investigation concerns alleged conduct. Arrests do not establish guilt, and this source update is not a report of convictions. The international tags reflect places directly discussed in the agency’s account. They should not be read as a crime-rate comparison between countries.