A search is underway in northern Switzerland for a shooter. The violence occurred at an all-night music event.
Aargau Cantonal Police confirmed that one person died. Five other people were injured during the early morning hours on Sunday.
The shooting took place at the Schachen horse racing track. The exact circumstances of the incident are still being investigated.
Authorities have not yet released details about the suspect or a motive.
The event was an electronic music festival.