A 21-year-old man has been arrested in connection with an assault in Carmarthenshire which left another man with serious head injuries.
The incident happened outside The Shaker nightclub, in Llanelli, at about 00:45 GMT on Sunday.
Dyfed-Powys Police said a man, in his 30s, is in a critical condition in hospital.
The arrested man, from Burry Port, remains in police custody. The force has appealed for witnesses.