Police are carrying out a controlled explosion at Luton Airport after security alert sparked an evacuation, disrupting flights for thousands of passengers.
Pictures on Twitter show hundreds of travellers crowded outside the terminal, and a bomb disposal van at the scene.
All incoming flights have been suspended and the approach road to the Bedfordshire airport has been closed.
Sky News sources say the alert is thought to have been sparked by a checked-in suitcase that was picked up by a security scanner.
A spokeswoman for the airport said: "London Luton Airport has evacuated the terminal building after a suspicious item was found in the security search area.