Post mortem results of elderly Derry man found dead inconclusive
Further tests will be required to determine precisely how the man died
Detectives have been granted a 36-hour extension by a court in relation to a man in his 50s arrested in connection with the death of a man in Derry earlier this week.
The deceased man, who was in his 80s named locally as retired orthodontist Noel O'Sullivan, was discovered at a house on Culmore Road on Wednesday, July 17.
A post mortem examination has been carried out however the results were inconclusive and further tests will be required to determine precisely how the man died.