The Army Bomb Squad are now at the scene after being given a Garda motorcycle escort to the scene.
It's believed a suspicious device was found in a premises and workers have been evacuated as a precaution.
Social media users have posted photos from the scene.
The Bomb Squad's remote controlled robot can be seen entering a building.
The Garda Press Office said: “Gardai are at the scene of a security alert in a business park in Maynooth, Co Kildare."
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The device is understood to have been found in an Ulster Bank office.
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