A post-mortem is due to be carried out on a man found dead at a house in East Belfast yesterday.
Forensics and police both attended the scene on Grand Parade.
Police have confirmed they're investigating the circumstances of the man's death.
A 35 year old man who was arrested on suspicion of being concerned in the supply of a controlled drug, remains in custody.
Police closed off Grand Parade between Dunraven Park and Orangefield Lane for a number of hours, but it has since re-opened.