There have been reports of several victims in a shooting incident at an event in northern Switzerland during the early hours of Sunday, local police said, appealing to the public for any film or pictures.
Cantonal police in Aargau said a large-scale operation was underway following the incident, which the mass-market Blick tabloid said occurred at a rave party.
The newspaper published video footage, taken from an elevated position, it said had come from a reader showing a night-time street scene with the sound of several shots being fired.
No further details were immediately available.
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