Overview

• From Friday to Saturday, serious collisions in Ainring, Birkenau, Elmshorn, Leipzig, Herne and elsewhere left several people critically hurt, triggered air-ambulance deployments and prompted expert reconstructions of the crash scenes.
• Berlin police said a driver who hit a group of children in Wedding carried about 90 grams of marijuana; a blood sample was taken and lab results are expected next week, with his licence seized.
• Investigations into suspected impairment intensified, including a Wernigerode bus driver with a rapid test positive for methamphetamine and THC and a Duisburg rollover where officers found nitrous-oxide canisters and took a blood sample.
• Knife violence included a Grevenbroich attack treated as attempted killing with two arrests and the main victim no longer in acute danger, and a Halberstadt asylum-centre stabbing where a 23-year-old suspect was arrested and jailed after a 26-year-old was critically injured.
• Police reported tactical responses in Ulm, where officers fired warning shots before subduing a knife-wielding man for psychiatric care, and in Essen, where an SEK shot and hospitalized a vocational-college suspect as motive inquiries continue.