A second man has been arrested on suspicion of murdering another man in Co Down.
Padraig Fox, 29, was found dead in a flat in Newcastle on Saturday afternoon.
The PSNI said a murder investigation got underway following the results of a post-mortem examination on Sunday.
A 21-year-old man was arrested this afternoon.
His detention followed the earlier arrest of a 26-year-old man.
Police later secured an additional 36 hours to question the 26-year-old suspect.
Police have appealed for anyone with information to come forward.
