All flights in and out of Glasgow Airport were suspended following a security incident involving a flight from London.
Officers were called to the terminal after the alarm was raised about an issue at 10.25am.
It involved an easyJet flight from Gatwick Airport.
A Police Scotland spokesman said: “There’s been a security alert reported and officers are in attendance.”
The airport said on Twitter: “Operations have been temporarily suspended due to an incident declared on an inbound flight. Emergency services are currently in attendance.”
Flights have since returned to being operational but police remain at the scene.