London City Airport has been evacuated following a fire alert.
Hundreds of passengers were ordered to leave the terminal building and no flights were able to take off or land.
Several incoming flights from destinations including Frankfurt, Amsterdam, Belfast City and Paris were diverted to other airports.
A London City Airport spokeswoman said the cause of the alarm was being investigated. She could not confirm whether a fire had been discovered.
London Fire Brigade said it was called to the airport at 4.11pm on Friday. Three fire engines and 15 firefighters were sent to the scene to work alongside crews based at the airport.