Police have named an 18-year-old man whose death is being treated as murder.
The teenager, who died after being found at an address in Portsmouth, has been identified as Oliver Blatcher, of Estella Road, in the Hampshire city.
A Hampshire police spokesman said: "Oliver died at Queen Alexandra Hospital. He was taken to hospital by ambulance from an address on Sackville Street, Portsmouth.
"A post mortem examination has been carried out, however the findings are inconclusive. Further tests will be carried out.
"Detectives continue to work hard to establish the exact circumstances surrounding the man's unexplained death, and the investigation is on-going.
"Specialist officers continue to support the family at this difficult time."
A 28-year-old man and a 32-year-old man who were arrested in connection with the death have been released from custody, but remain under investigation.
Police said that Mr Blatcher was found with "significant injuries" and that officers had carried out inquiries in different areas of Portsmouth as they believed he could have been assaulted earlier in the evening.