Terrorists could use 'dark' drones to cause carnage

A drone expert is warning that an attack by a swarm of "dark" drones could cause carnage at a large public event or devastate critical national infrastructure.

- JANE DALTON

Both Ukraine and Russia use drone swarms as huge, unmanned air forces to destroy and intimidate each other's forces and civilian populations.

But their radio frequency signals are susceptible to being jammed, so Kyiv turned to hi-tech drones that use fibre optic cables instead, and Moscow quickly followed suit.

These drones, tethered with long, fine cables, are resistant to electronic jamming. They are dubbed "dark" because of the absence of detectable radio frequency emissions.