This is the best summary I could come up with:

Students were evacuated from the premises following reports that two young people at the school had threatened to use a gun.

Police spokesperson Holger Vehren told reporters that special forces completed a search of the building and found no trace of the perpetrators.

“It later emerged that one of the 12-year-olds and the 13-year-old could also be responsible for the crime” at the school, said police, adding that officers also “seized two apparent toy weapons.”

Tactical forces were deployed to the school in the Blankenese district shortly before 11 a.m. local time after “indications of a threat situation,” police said.

The German mass-circulation daily newspaper Bild had reported that two young people, possibly students, had barricaded themselves into a classroom with one of them threatening that they would use a gun.

Police spokesperson Vehren said the teacher “who was specifically threatened” and students of the eighth-grade class would be questioned as part of a criminal investigation.

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