Two men have been arrested in connection with the murder of Peter Murphy in Cork over four years ago.
The 37 year old was found dead at his home in Shanavoher in Bweeng on February 7th 2015.
A post-mortem examination established that Mr. Murphy had been assaulted.
So far over 200 witnesses have been interviewed and more than 1,200 hours of CCTV have been reviewed.
Gardai in Mallow have today arrested two men in their 20s who can be held for up to seven days.