Gardaí are appealing for witnesses after reports of shots being fired in the Clondalkin area of west Dublin.
It happened in the Fonthill Cottages area at around 8.50pm on Thursday.
Gardaí noticed a number of apparent bullet holes in the front windows at two separate houses.
The scene was sealed off and a technical examination was carried out by the Divisional Scenes of Crime Unit.
The houses were unoccupied at the time and no one was injured.
No arrests have been made and investigations are ongoing.
Gardaí are appealing for any person who was in the vicinity at the time of the incident - or to anyone who may have witnessed any vehicle, particularly a Black Audi or a Silver Volkwagen Golf, to contact Gardaí.
They are also appealing for any road users who may have camera footage and were travelling in the area at the time to contact Lucan Garda station on 01-666-7300, the Garda Confidential Line at 1800-666-111, or any Garda station.