At least five flights, including two from the UK, have been affected by bomb threats, which caused unplanned landings and temporary airport closures.
Warsaw-Modlin Airport temporarily closed after a flight from London Heathrow, operated by Polish airline LOT, was diverted there. It had been due to land at Warsaw-Chopin Airport.
The airport has since reopened and no device was found.
A bomb threat was also reported on a Scandinavian Airlines flight from Copenhagen to Warsaw, which landed at Warsaw-Chopin Airport, with the airport later confirming that no device was found.
