Swiss Federal Railways is using drones to combat the blight of graffiti.
It costs millions of francs a year to clean train carriages.
The company has been given permission by the Civil Aviation Office to fly at night above the train tracks. The drones are at a height of 30 metres and can spot any trespassing on the railway.
The SBB is not revealing how many times it has used the drones since the programme started in July.
Heat kills more than the roads
Heat now kills more people in Switzerland than road accidents.
Geneva left with the bill after G7
Geneva cantonal minister Carole-Anne Kast says Bern gave in too easily to France over who pays for last month's G7 summit in Évian.
High wildfire risks increases further
The wildfire risk has climbed to the highest level so far, with Valais now under "very high danger" and open fires banned across several cantons.
HPV vaccines for all
Switzerland has become the first country in Europe to widen its HPV vaccine to everyone aged 9 to 45, including men up to 45.
Yverdon maps its heat island
With the Plateau facing 35 degrees on Thursday, Yverdon-les-Bains has installed 15 sensors to work out how hot its own streets really get.
Shaqiri meets hundreds of fans in Geneva
Hundreds of football fans packed Geneva's La Praille shopping centre yesterday to meet Swiss star Xherdan Shaqiri.
