Heathrow Airport built a “bespoke set of anti-drone systems” around its airfield. The system, created by U.K.-based firm Operational Solutions, detects and tracks drones in surrounding airspace. The “new and innovative” system can also locate drone pilots and show their location.

Heathrow said the system is designed to keep passengers safe and minimize flight delays. The airport did not disclose how the system takes drones down, or the cost to implement.

The system follows a widespread disruption at Gatwick Airport in December 2018 due to a drone presence. As a result, the U.K. government extended the “no fly zone” around its airports from 1 kilometer to five.

“The safety and security of our passengers and colleagues is our number one priority. That is why we’re investing in this new cutting-edge technology which will enhance our capabilities in the detection and deterrence of drones in and around our airfield. We’re delighted to have this unique system keeping our skies safe and helping passengers and cargo to get to their destinations on time,” said Jonathan Coen, director of security, London Heathrow Airport.