The incident occurred on Sunday.
A dog was shot and killed by Gardaí during a drugs search in Dublin on Sunday.
As a result of the search of a house at Coburg Place, Dublin 1, Gardaí arrested a man in his 40s.
As part of an ongoing investigation, the search of the house was carried out under warrant by the DMR Armed Support Unit with assistance from the Coolock Detective Unit.
A search of the premises uncovered a quantity of controlled drugs with an approximate street value of €5,000.
During the operation, an official firearm was discharged when Gardaí were attacked by a dog inside the house.
The dog received veterinary treatment "but didn’t survive the injuries sustained", Gardaí said.
A Garda scenes-of-crime unit has attended the premises to carry out an examination.
As an official firearm was discharged, the incident has been notified to the Garda Síochána Ombudsman Commission, which is standard procedure.
The man who was arrested is set to appear at the Criminal Courts of Justice at 10.30am on Monday (15 February).
