Children had discovered a dead woman on the grounds of a school in North Rhine-Westphalia. In the autopsy of the dead 19-year-old, there were signs of a violent death by strangulation, police and prosecutors said.

The suspect and the dead knew each other, it said. Classes at the elementary school were canceled on Monday, according to the city of Recklinghausen. The investigation into the motive for the crime and evaluations of the traces continued on Monday evening.