By Piotr Bąkowski

Faced with a persistent terrorist threat, the European Union (EU) is playing an increasingly ambitious role in counter-terrorism. While primary responsibility for combating crime and ensuring security lies with the Member States, the EU provides cooperation, coordination and (to some extent) harmonisation, as well as financial support, to address this borderless phenomenon. Moreover, awareness of the connection between development and stability, as well as between internal and external security, has come to shape EU action beyond Union borders. EU spending on counter-terrorism has increased over the years, to allow for better cooperation between national law enforcement authorities and enhanced support by the EU bodies in charge of security and justice, such as Europol, eu-LISA and Eurojust. The many new rules and instruments that have been adopted in recent years focus, among other things, on harmonising definitions of terrorist offences and sanctions, sharing information and data, protecting borders, countering terrorist financing and regulating firearms. However, implementing and evaluating the various measures is a challenging task. The European Parliament has played an active role not only in shaping legislation, but also in evaluating existing tools and gaps through the work accomplished by its Special Committee on Terrorism (TERR) in 2018. In line with the Parliament's recommendations, as well as the priorities set by the European Commission and its counter-terrorism agenda presented in December 2020, EU counter-terrorism action has focused on doing more to anticipate threats, counter radicalisation, and reduce vulnerabilities by making critical infrastructures more resilient and improving the protection of public spaces. The EU will also continue to address the online dimension of various forms of extremism, in line with the regulations on dissemination of terrorist content online and on the provision of digital services in the EU. This briefing updates an earlier one, entitled Understanding EU counter-terrorism policy, published in 2023.

Brussels: EPRS | European Parliamentary Research Service, 2025. 12p.

By Europol

  The European Union Terrorism Situation and Trend Report (EU TE-SAT) 2024 is a situational overview, presenting figures, major developments and trends in the terrorism landscape in the EU in 2023. The report is based on qualitative and quantitative data provided by the Member States on terrorist attacks, arrests and convictions and penalties for terrorist offences. Additionally, Europol’s cooperation partners provided valuable qualitative information and assessments, to facilitate reflection on developments beyond the EU that affect the security of the Union and its citizens. Information on convictions and acquittals for terrorist offences, as well as on amendments to national legislation on terrorism provided by Eurojust and based on data shared by Member States, complements the report. According to EU Directive (EU) 2017/541 on combating terrorism , which Member States had an obligation to transpose into their national legislation by 8 September 2018, terrorist offences are criminal acts carried out with the aim of seriously intimidating a population, unduly compelling a government or international organisation to perform or abstain from performing any act, or seriously destabilising or destroying the fundamental political, constitutional, economic or social structures of a country or an international organisation. The EU TE-SAT identifies and elaborates on various forms of terrorism motivated by specific ideologies . These include jihadist terrorism, right-wing terrorism, left-wing and anarchist terrorism, ethno-nationalist and separatist terrorism, and other forms of terrorism. Notwithstanding the existence of different legislative frameworks at the national level, Directive (EU) 2017/541 establishes minimum EU rules concerning the definitions of offences and related sanctions in counter-terrorism and provides a harmonised definition of terrorist offences. On this basis, the EU TE-SAT provides statistical data on terrorist attacks, arrests and convictions in Member States. At a national level, the legislation pertaining to terrorism varies within the limits set by the aforementioned Directive, as Member States are afforded a certain degree of flexibility in their legislative processes. Consequently, the quantitative analysis presented in the EU TE-SAT reflects Member States’ definitions of terrorist offences according to their national legislation. It should be noted that these definitions may be broader in scope than the definitions set out in Directive (EU) 2017/541, although they cannot have a narrower scope. While the primary scope of the EU TE-SAT is to present the situational picture on terrorism, the report also presents specific violent extremist incidents, acts, activities and developments, reported by the Member States. While the quantitative overview of terrorist attacks, arrests, convictions and penalties does not include instances of violent extremism, the latter is included in the report for contextualisation purposes and to provide a more comprehensive picture of the security threats to the Union.   

Publications Office of the European Union, Luxembourg. 2024. 72p.

By Nicholas Corsaro, Robin S. Engel, Tamara D. Herold,. Murat Yildirim

The gang and gun violence reduction project implemented in Las Vegas consisted of three components: hot spots deployment, focused deterrence, and place network investigations. This report focuses on the development, implementation, and evaluation of the hot spots strategy. The hot spots strategy involved the strategic deployment of additional saturation police patrols in high-crime locations. Specifically, to address violent street crime, the LVMPD engaged in a 6- month (Nov 1, 2018 to Apr 30, 2019) cluster randomized controlled trial (RCT) design of street segments receiving additional hot spots deployment (saturation patrols) and streets receiving patrol as usual (control segments). All potential street segments were identified from an analysis of persistent violent crime hot spots (where intensive police focus has been paid by the violent crime unit officers since January of 2018). Researchers stratified highest risk and independent segments within chronic and persistent hot spot locations. Specifically, 22 treatment segments and 22 control segments were selected to form the evaluation. No treatment segment was within a block or intersection of another treatment or control segment to reduce potential contamination of findings. Deployment of officers to the treatment hot spots occurred via calls for service every day, randomly for a total of two hours of exposure at each hot spot. Officers were instructed to remain at the hot spot for a total of 15 minutes, which is the optimum time for deployment to achieve effects as identified by researchers (Koper, 1995). When reaching the hot spot, officers were also randomly instructed to either stay in their vehicle with the lights on, or patrol the segment on foot. Interviews with arrestees have shown police presence is understood and alters criminal behaviors in patrolled areas (Golub et al., 2003). However, hot spot patrols such as walking are likely to go unnoticed by ordinary citizens (Weisburd, Hinkle, Fameaga, & Ready, 2011). Therefore, using both treatment types (stationary with lights and foot patrol) likely leads to increased awareness of police, thereby reducing criminal activity. The control treatment was for business to occur as usual at the control street segments. Center researchers conducted fidelity assessments during the project implementation phase, in order to ensure that the strategy was being implemented properly. These assessments indicated a strong adherence to the research design. Specifically, the research design called for a total of 2 hours of saturation patrol (in 15-minute increments) each day. Analysis of all hot spot patrols revealed that approximately 1.5 hours of additional patrol was observed each day for 90% of all hot spots. A total of 2 hours of additional patrol as observed for 55% of all hot spots. These findings demonstrate that the LVMPD carried out the hot spots strategy as designed.

Alexandria, VA: International Association of Chiefs of Police, 2019. 43p.

By Ekrem Ersen Emeksiz

ABSTRACT This research presents Istanbul, Turkey and its law enforcement as a case study for the design of a contingency plan to increase efficiency of counterterrorism efforts and coordination among the agencies. This contingency plan involves the implementation of techniques and strategies based on situational crime prevention, moral panic and crisis theories on predetermined terror targets in the city of Istanbul to reduce the impact of a mega terrorist attack. The research applies the EVIL DONE and CARVER concepts to assess current terrorism risks and threats for critical targets. In assessing risks and threat conditions, this research proposes a contingency plan for law enforcement in Istanbul. The purpose of the contingency plan is to reduce target vulnerabilities and enhance target resilience as well as control moral panic conditions during large-scale terror incidents.

Unpublished paper. 2023. 25p.

By Ulrich Garms, Lara Wilkinson, and Amrita Kapur

Women and men, girls and boys are among the victims of acts of terrorism, such as hostage-taking, explosives attacks in public places, or aeroplane hijacking. Terrorist groups, however, also specifically target women through acts of sexual and gender-based violence – such as rape, sexual slavery and forced marriage – as a means of achieving tactical, strategic and ideological aims. Many terrorist groups encroach on women’s human rights and impede their socioeconomic development, including by restricting their movement. In some contexts, women disproportionately experience internal displacement as a result of terrorist threats, and lose access to livelihoods owing to terrorist attacks. Women may also face gender-specific difficulties when attempting to access justice and seeking remedies as victims of terrorism.

Vienna: UNODC, 2019. 214p.

Edited by Beatrice de Graaf and Alex P. Schmid.

A Performative Perspective. “…terrorism trials can be an exceptional opportunity better to understand and, hence, counter terrorism, since they are the only place where most, if not all, of the actors in a terrorist incident meet again: terrorists, state representatives, the judiciary, the audience, surviving victims, terrorist sympathisers, etc. The media will report and broadcast their respective performances. Forming a nexus between terrorist violence, law enforcement and public opinion, terrorism trials thus offer the prospect of showcasing justice in progress, and in so doing of demonstrating to the world how terrorist suspects are dealt with under the laws of the land.”

Leiden University Press (2016) 603p.