(Bloomberg) -- A 22-year-old Italian woman died and five other people were wounded in a shooting at a Swiss rave party that left police puzzling over what was behind the outburst of violence.

Manhunt underway after attack at techno party in Aarau, but police admit investigation is in early stages, and they have little information about perpetrator or their motives

Swiss police and media say that a shooting at a rave in the northern Swiss canton of Aargau has killed one person and left five injured.