A major effort is underway at a school in Upper Bavaria in Germany.
Shots are said to have been fired and several are believed to be injured.
A suspected perpetrator has been arrested.
Several people are said to have been injured in a suspected act of violence at a high school in Schongau, southwest of Munich.
At least four people are said to be seriously injured, according to information to Bild.
There are signs that shots have been fired, a police spokesperson told the newspaper.
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