DYFED-Powys Police is continuing to investigate an incident which occurred in the Bridge Street area of Lampeter at around 6pm on Thursday, November 8.
Sadly, the woman taken to hospital following the incident has died. Specialist officers are supporting the family.
H.M Coroner has been informed.
Four men from the Lampeter area were arrested in connection with the incident:-
A 40-year-old man remains in police custody.
A 27-year-old man has been released on police bail.
A 31-year-old man has been released with no further action.
A 37-year-old man has been released with no further action.
DCI Anthony Evans said: “This is now a murder enquiry and I am appealing to anyone with information that could help the investigation, no matter how insignificant you may feel it is, please get in touch.
“I would like to reassure the public that we are not looking for anyone else in connection with the incident.”
Anyone with information that can help officers with their investigation is asked to report it by calling 101. If you are deaf, hard of hearing or speech impaired text the non-emergency number on 07811 311 908.