The fire department cordoned off a large area around the site. Police said a manhunt is under way following the incident at the annual techno party. Key points and original sources are listed below.

• The fire department cordoned off a large area around the site.S1

• Police said a manhunt is under way following the incident at the annual techno party.S2

• Unidentified perpetrators are yet to be traced; some 3,500 people attended the annual techno party in AarauS3

• Police cars, ambulances, and firefighters descended on the rave at a racecourse in the Swiss town of Aarau after gunshots rang out at 2.30am this morningS4

• Major police response after several people hit by gunfire in incident north of ZurichOne person has been killed and five others wounded in a shooting at a rave party in northern Switzerland, local police said on Sunday.“The search for the perpetrators, whose i...S5