Detectives investigating the death of a woman in Stoke-on-Trent have identified her as Natasha Stewart, aged 31.
Natasha's body was found at an address on Watkin Street, Stoke-on-Trent on the morning of 23 May.
Detectives have continued to investigate the suspicious death and have made a number of arrests in the past week.
Two 30-year-old women from Stoke-on-Trent were arrested in relation to the investigation, one on suspicion of administering a noxious substance and the other on suspicion of being concerned in the supply of drugs.
Two men, aged 29 and 33, also from the city, were arrested on suspicion of being concerned in the supply of drugs.
All four have since been released under investigation pending further enquiries.
A post mortem to establish the cause of death was unable to ascertain the cause of death and further tests are required.
Detective Constable Dave Stubbs, officer in the case for Staffordshire Police, said: "Our thoughts are with Natasha's family at this time and we are providing specialist support to those affected.
"We continue to follow up a number of leads and would like to thank the public for their support so far. However if you do know anything that could help the investigation, please get in touch."
Anyone with information about the incident should contact david.stubbs@staffordshire.