An 18 year old man who was found seriously injured at an address in Portsmouth has died.
Paramedics were called to Sackville Street in the early hours of Saturday 10th February.
Officers believe the man may have been assaulted earlier in the evening.
The teenager was taken to the Queen Alexandra Hospital with 'significant injuries' where he died.
Police are carrying out enquiries in surrounding roads including Liverpool Road, Manchester Road, Guildford Road, and Sandringham Road.
Two men arrested in connection with the death of an 18-year-old man in Portsmouth have been released from custody, but remain under investigation.