For information only. This guide is an editorial orientation resource. It does not constitute security advice and does not replace the guidance of your mission’s security officer or your organisation. Security situations change; the information here reflects publicly available sources as of the reviewed date. Always follow your mission’s or organisation’s current security protocols.
Brussels in the multilateral security context
Brussels is the seat of the EU’s principal institutions, the headquarters of NATO, and Belgium’s capital. This gives it a concentration of high-value institutional targets that is unlike any other European posting. The permanent presence of large numbers of accredited staff means that security awareness is a standing feature of diplomatic life in Brussels, not a situational one.
The Belgian threat assessment framework
Belgium’s terrorism threat is assessed and communicated by the Coordination Unit for Threat Analysis (CUTA / OCAM), the interagency body that produces official threat assessments for Belgium on a scale of 1 to 4:
| Level | Definition |
|---|---|
| 1 | Threat unlikely; threat reports rare and lacking credibility |
| 2 | Attack considered not very likely; heightened monitoring |
| 3 | Attack considered possible and plausible |
| 4 | Attack considered imminent; concrete and credible intelligence |
Belgium’s general national threat level has stood at 3 since October 2023, following a terrorist attack in Brussels that month. At level 3, CUTA’s assessment is that a terrorist or extremist attack is “possible and plausible.” This level has been the baseline for Belgium for most of the period since the January 2015 Verviers operation, with the brief exception of a period at level 2 between January 2018 and October 2023.
For the current assessed level, consult the CUTA general threat level page directly, as it is updated in real time.
The US State Department’s OSAC Belgium Country Security Report (September 2025) assesses Brussels as a medium-threat location for terrorism directed at or affecting official US government interests, and a low-threat location for political violence.
Nature of the threat
Belgium’s counterterrorism authorities have consistently identified homegrown terrorism, individuals or small cells inspired by jihadist extremism, as the primary threat, alongside violent right-wing extremism at a lower scale. Cross-border networks and the challenge of monitoring individuals returning from conflict zones have featured prominently in threat assessments in recent years.
Brussels has experienced significant attacks (March 2016 at Zaventem airport and Maelbeek metro station) and ongoing plot disruptions. The pattern of disrupted plots in Belgium has included targets with high symbolic value: institutional buildings, public gatherings, and prominent individuals.
The EU quarter and NATO headquarters
The European Quarter (Schuman, Maelbeek, Trône) is among the most closely patrolled areas of Brussels, with permanent security perimeters around the European Commission, the Council of the EU, the European Parliament, and associated buildings. Access control and vehicle security measures are enforced continuously. For accredited EU staff, security briefings on current access procedures are standard on arrival.
NATO Headquarters at Evere (north-east Brussels) operates under the Alliance’s own security framework, with Belgian federal support. Staff with NATO accreditation receive organisation-specific security briefings; these take precedence over general guidance.
Everyday security
Street crime in Brussels is primarily opportunistic theft: pickpocketing in the metro, theft from vehicles, and bag snatching, concentrated around transport hubs and the main tourist areas. The metro network, particularly lines 1 and 5 through the city centre, and the area around Brussels Midi / Gare du Midi, warrants standard urban vigilance.
Residential areas favoured by EU and NATO-accredited staff, including Ixelles / Elsene, Etterbeek, Woluwe-Saint-Lambert, Woluwe-Saint-Pierre and Auderghem, have lower everyday crime rates and are generally calm. The area around Ixelles market (Flagey) and the upper city (Uccle, Forest) are also frequently chosen by diplomatic families.
Practical precautions:
- Register your presence with your country’s embassy or high commission in Belgium upon arrival, if not done through your organisation.
- Keep mission and organisation security emergency contacts accessible.
- Remain aware of demonstrations, which in Brussels can move quickly between institutional areas. The area between the Schuman roundabout and the Berlaymont sees regular protest activity during EU Council periods.
- In the event of a security incident, follow your organisation’s lockdown and shelter-in-place procedures.
Emergency contacts in Belgium
| Number | Service |
|---|---|
| 112 | European emergency number: fire, medical, rescue |
| 101 | Police (non-emergency) |
| 100 | Fire brigade and ambulance |
Belgium’s Crisis Centre (Centre de Crise / Nationaal Crisiscentrum) coordinates emergency communications during major incidents. Its website and social media channels carry official public advisories during elevated security events.