Man Arrested After Swiss Rave Shooting Killed Woman

A man was arrested after a shooting at a techno rave in Switzerland. The event was in Aarau. A 22-year-old woman from Italy died. Several other people were hurt. Police said they arrested a suspect after the attack. They are now working to understand what happened and why. The police also asked people to stay calm and follow safety rules. The investigation is ongoing, and more details may come later.