A woman was arrested on Friday morning after daubing paint at the constituency office of Taoiseach Enda Kenny in Castlebar, Co Mayo.
The local woman painted two messages - “How Many More Children?” and “Represent Me” - on the exterior wall of the building in what was understood to be a protest over the situation in war-torn Syria.
The woman then began to smear red paint on another section of wall before she was interrupted by gardaí.
After the arrest, a can of overturned paint and a brush lay on the ground for some time until a forensic examination of the scene was completed.
The Taoiseach was not present in the office building during the protest.
The woman, who is from the Co Mayo area, was released from custody in Castlebar Garda Station around 3 pm.
Gardaí say a file will now be prepared for the DPP on the incident.