What counter-terrorism alert level 4 means and what the Interior Ministry alert says

The anti-terror warning level measures the threat on a scale of 1 to 5. Spain has been on level 4 since June 26, 2015, according to Moncloa.com and Onda Vasca. On 17 October 2023, following the beginning of the conflict in the Middle East and the attacks by France and Brussels, Interiorined that level and ordered the security forces to apply complementary measures, according to Basque Wave. It has not reached level 5.

The Cybersecurity Coordination Office (OCC) warning of 23 October 2026 is an internal warning about localized content on the internet, not a level change. According to Alerta Siete, it has two pages, includes a capture of the message in English and does not fix date or specific objectives in Spain, does not identify the authors, does not describe operational preparations or attribute the message to the leadership of the Islamic State. Police sources quoted by the Ara newspaper point out that this type of calls is not unusual on Daesh-related websites.

The answer is preventive. According to Infobae, security forces are reviewing the alert to strengthen prevention in public calls and sensitive points, and the OCC continues to monitor the portal and copies of the message on other platforms. An internal note from the Mossos d'Esquadra, cited by Ara, asks to review service orders and equipment without generating unnecessary alarm.

On police activity, Infobae and Alerta Siete cite Interior data according to which until 14 October 2026 there were 95 detainees for jihadist terrorism in the year, 91 of them in Spain and 4 in operations in other countries; in 2025 they were 113. Moncloa.com gives another figure, 86 arrests in 47 operations in 23 provinces, linked to the anti-terrorist struggle in general and without a cut date, so they are not comparable.

What is not known: who published the message and from where, whether the alert has led to investigations or arrests, and whether Interior will make some public assessment. The full text of the warning has not been published.