Motorists travelling to the Belfast International Airport on Wednesday afternoon have been advised to leave extra time for their journey.
Emergency services have been at the scene, close to the airport entrance, for a while after a multi-vehicle crash in the area.
An eyewitness told Belfast Live that the crash involves two cars and it is unsure whether there are any injuries at this time.
Read more: Belfast airport queues 'bedlam' for early morning flyers
A spokesperson for Belfast International Airport tweeted out the alert.
They said: "There has been a road traffic accident close to the airport entrance and the road is currently blocked. Please leave extra time for your journey."
A PSNI spokesperson said: "Motorists are advised that there are delays in the Airport Road area of Crumlin this afternoon near the international airport due to a road traffic collision.
"The road is not closed, however, traffic is building and motorists are advised to leave extra time for their journeys or take another route if possible."
In other news, Belfast International Airport has been criticised after passengers turning up to catch early morning flights were faced with "queues out the door".
One passenger who arrived at the airport in the early hours of Tuesday morning described a scene of "total bedlam".
They said there was a long queue at one of the car parks outside the airport, which caused a road blockage at 5am.
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