Two men arrested on suspicion of murder have been released by police.
A 40-year-old man was killed after a fight at New Tredegar Rugby Club on Saturday.
Police were called to the club at around 11.45pm on July 6.
The man was found unconscious and not breathing when officers arrived and they performed CPR. However the man was pronounced dead.
A 41-year-old man and a 61-year-old man, both from the Caerphilly area, were arrested on suspicion of murder.
Gwent Police said they have been released under investigation.
Anyone with information can contact Gwent Police on 101, quoting log 620 of 6/7/19. Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.