Departures at London's Heathrow have come to a standstill after a "drone sighting" in the area, the airport has said on Twitter.
The incident comes less than a month after suspected drone sightings caused chaos at Gatwick Airport, forcing flights to be cancelled and disrupting travel plans for 140,000 people.
“We are responding to a drone sighting at Heathrow,” Europe’s busiest airport said in a statement. “As a precautionary measure, we have stopped departures while we investigate. We apologise to passengers for any inconvenience this may cause.”
— Flightradar24 (@flightradar24) January 8, 2019
— Leonard Berberi (@leonard_berberi) January 8, 2019
Read more: London’s Heathrow airport grounds all departures after DRONE sighting