A serious accident on the A9 motorway caused major disruption after an articulated lorry carrying hazardous materials overturned during heavy rain. Authorities say the truck reportedly lost control, jackknifed, and spilled industrial chemicals across multiple lanes, while several nearby passenger vehicles were damaged in the crash. Thick black smoke and small fires prompted a full hazmat emergency response, with firefighters, paramedics, and specialized environmental teams working to contain the situation. Multiple injuries were reported, though officials have not confirmed casualty numbers. Police closed the motorway in both directions as investigators examined the cause and assessed environmental risks from the chemical spill.