Two off duty Garda were attacked while on a night out in Bray.
The attack happened at around 3.30am on Friday morning on Strand road.
Dean Bolger who is based in Greystones suffered a fractured skull and fractured eye socket in the assault and is being treated in Beaumount hospital.
His colleague Sean Liddy who is based in Bray garda station was also attacked in the incident but did not recieve hospital treatment.
The incident was witnessed by a taxi driver and Gardai are currently reviewing CCTV.
Two of the attackers are being described as 5ft 11, while a third man was described as being 6ft 4, all were wearing jeans with dark zipped jackets.
If you can assist the Gardai with their investigation call Bray Garda station at 0