Polish police arrest and detain minors over threats tied to “Bloody Friday,” amid online rumours about a possible series of school attacks. Authorities say they are increasing police presence around schools and investigating claims circulating on social media, including plans allegedly linked to 9 October.

Outlets report fear is spreading after two stabbings in schools within a week. Police state their inquiries have not found evidence for an “online challenge” supposedly behind the attacks. In some areas, such as parts of the Mazovia region, local authorities cancel on-site classes for safety while officers monitor schools thought to be at risk. Euronews reports at least one detention of a 17-year-old, alongside broader action against other young people suspected of making or amplifying threatening posts.

While reporting focuses on detentions, the accounts align on the core response: heightened security measures, targeted monitoring of threatened locations, and efforts to counter rumours online following recent attacks.