The woman arrested on Thursday in connection with the discovery of a woman’s body in Rugby was released on police bail on Friday pending further enquiries.
A post mortem examination on the deceased woman was carried out on Thursday but was inconclusive, and officers are now waiting for the results of toxicology tests.
The death is still being treated as unexplained.
Police would like to hear from anyone who was in the area of Albert Street or James Street late on Wednesday night or the very early hours of Thursday morning, or anyone with information which may help them with their enquiries.
Anyone with information is asked to contact Warwickshire Police on 101 or Crimestoppers anonymously on 0800 555 111.