Shots were fired at a German school in the northern city of Bremerhaven on Thursday and one person was severely injured, newspaper Bild reported, citing police.
One person was detained after the shooting and a second suspect was on the run, armed with a crossbow, Bild added.
The shooting took place at the Lloyd Gymnasium, Bild reported, adding, that a schoolgirl who heard shots had called the police.
The police were not immediately available for comment.