Dozens of youngsters were targeted in a pepper spray incident, with at the very least 12 needing hospital treatment in western Germany.
The alarm was raised after unknown attackers released pepper spray at a primary school in Hürth, North Rhine-Westphalia outside Cologne.
Children complained of dizziness, irritated eyes or coughing.
In total, the ambulance crews checked 49 children at the varsity, which has not been publicly named.
The constructing was evacuated following the incident, which was reported at around 10.20am.
Twelve children were taken to the hospital, while seven children were treated on the scene by paramedics.
The hearth department declared a mass casualty incident, based on the German day by day Westdeutsche Zeitung.
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