The Jassbach military barracks in the canton of Bern has been overflown at night by drones in what looks like an espionage attempt.
Cyber and intelligence specialists work at the site, which was targeted in February.
The drones are thought to be foreign.
The International Institute for Strategic Studies has counted 144 suspicious drone incidents across Europe, and Switzerland does not yet have effective means to counter this kind of threat.
Elderly deaths rise during the heatwave
Switzerland's June heatwave is being blamed for around 200 additional deaths among people over 65, according to new federal figures.
Bars can stay open all night for Quarter-Final clash
Geneva is allowing bars and restaurants to stay open through the night this Saturday so fans can watch the World Cup quarter-final against Argentina.
Swiss football shirts sell out
Football fever is emptying the shelves.
Geneva bans forest fires
Geneva is banning all fires in forests and near woodland as the risk of wildfires rises.
Small girl left alone on train
A five-year-old girl was accidentally left alone on a train in canton Fribourg after missing her stop on the way to school.
Twint rival launches
A Swiss-made rival to Twint has officially launched.
