Mini drones are set to be rolled out at train depots in Germany to catch vandals who deface carriages with graffiti at night.
Deutsche Bahn plans to start testing the aerial vehicles, which have four helicopter-style rotors and can shoot high-resolution pictures using thermal imaging cameras.
A pilot would remotely steer the drones, which can fly at a height of up to 150 metres and speeds of up to 33mph.
"We are going to use this technology in problem areas where taggers are most active," a spokesman for Deutsche Bahn said.
Source: Sky News. Read full article. (link)