Duisburg, Germany, has witnessed a significant disruption in its educational sector following anonymous threats that prompted police investigations and increased security measures.

Nearly 20 total and secondary schools in the city transitioned to remote learning as a precautionary measure after alarming communications were directed at school authorities.

These threats are reportedly connected to far-right extremist elements, raising concerns about the safety of students and staff in a city where a substantial percentage of the student population comes from immigrant backgrounds.

The State Protection Agency identified concerning messages that hinted at potential violent actions planned for Monday, April 7, 2025, framing it as a 'cleansing' operation targeting educational institutions.

An email sent to Gesamtschule Duisburg-Mitte on Friday included disturbing radical statements, prompting immediate intervention from local authorities.

Duisburg police reported that further threatening communications were received the following day, amplifying fears regarding security.

Duisburg’s police chief confirmed that a recently sent message contained threats directed at multiple schools within the city, which prompted a coordinated response involving law enforcement and educational leaders.

In light of the threats, the Düsseldorf District Government, responsible for local schooling, decided to cancel in-person classes for Monday.

This decision was supported by Duisburg’s Mayor Sören Link, who highlighted the importance of ensuring safety for all students.

The situation has led even those high schools that were not specifically mentioned in the threats to implement remote learning, given their proximity to affected campuses.

Schools have advised parents that attendance is at their discretion, with many institutions recommending families keep children home amidst ongoing uncertainties surrounding the threats.

The political response has been rapid, with the North Rhine-Westphalia state parliament expressing alarm over the demographic makeup of the schools involved, where it is estimated that up to 90% of students identify as having a migration background.

The Social Democratic Party (SPD) has called for a special session of the school committee and requested immediate discussions within the interior committee regarding the apparent increase in extremist threats.

Investigations into the origin of the recent threats are ongoing, coinciding with previous incidents in March where similar intimidation tactics were identified at Duisburg high schools.

In those prior events, authorities traced the threats to three students, underscoring a continuing concern about the safety and security within the educational environment of Duisburg.