A man and women have been arrested over drone activity at London's Gatwick Airport, which led to the closure of the airports runway this week.
The airport is continuing to work through a backlog of cancelled and delayed flights.
More than 100,000 Christmas travellers were affected when flights were grounded from Wednesday night to early yesterday.
Our runway is open. Passengers are advised to check with their airline before travelling to the airport.
— Gatwick Airport LGW (@Gatwick_Airport) December 22, 2018
Police said a man and woman were detained "in the Gatwick area" last night.
Paul Burt is from a company which provided equipment to help with the investigation.
He explains how they targeted the problem: "Firstly to detect the drone, secondly to track it, thirdly to identify it and then fourthly to defeart it or take action against it.
"And our technology is designed to fit into a system that allows the operator to do just that".
Superintendent James Collis said: "We continue to urge the public, passengers and the wider community around Gatwick to be vigilant and support us by contacting us immediately if they believe they have any information that can help us in bringing those responsible to justice.
"The arrests we have made are a result of our determination to keep the public safe from harm.
"Every line of enquiry will remain open to us until we are confident that we have mitigated further threats to the safety of passengers."