The man who died in suspicious circumstances in Newtownards on Tuesday has been named as Dessie Mee.
Police have named 45-year-old Mr Mee from Blenheim Drive in the town as part of attempts to establish his last known movements.
Detective Superintendent Kevin Geddes said: “Mr Mee was found outside Millers House apartment block in Regent Street shortly before 7.50pm last night. He had been in an apartment immediately beforehand.
“We are appealing for information about Mr Mee’s movements last night and in the last few days. We are also appealing for information about activity in and around apartment number 25 at Millers House last night between 6pm and 8.30pm.
“Three people remain in custody, a 29 year old woman and two men aged 35 and 42. A post mortem examination will take place in due course.
“I would appeal to anyone with information about Mr Mee’s death or activity at the apartment to contact detectives at Newtownards police station.”