The gates at Government Buildings on Merrion Street in Dublin have been damaged in an apparent ramming overnight.
The scene has been sealed off and a man has been arrested.
Gardaí say this incident happened at around half 2 this morning.
Images show damage to a white van at the Department of the Taoiseach and at the Office of the Attorney General - with at least three separate gates damaged - one of them was taken of its hinges.
A man in his 40s has been arrested on suspicion of offences under the Road Traffic Act and is being held at a garda station in the city.
A technical exam of the scene is due to place this morning.
Reporting by Emma Tyrell
Keep up to date with all the latest news on our website, beat102103.com.