A 46-year-old woman who died after being found on the floor at her home in Felixstowe has been named as Diana Last.
Police were called to Leeward Court following concerns for a woman who felt 'very unwell' and had been admitted to Ipswich hospital.
Officers began an investigation and arrested a 58-year-old man from Felixstowe. He's since been released under investigation while further enquiries are carried out.
Following a post mortem examination, her cause of death is undetermined and further tests will be carried out.
Anyone with information about what happened is asked to call the Major Investigation Team by dialling Suffolk Police on 101.