Geneva police are still not releasing any further information following a heavily armed raid on a caravan at a campsite in Satigny on Sunday evening.
Witnesses say their relaxing evening was shattered by a swat team in full armour with several vehicles arriving on site and surrounding a caravan.
All the bystanders were told to go inside and stay there.
After around 20 minutes, a person was taken away and the campers were told everything is safe.
Police have confirmed the operation at the Val de l’Allondon campsite to the press – but are not saying anything else.