Police are investigating the possibility that there may be a drug link to the death of a man in his 20s in Banbridge.
The man died suddenly in a house on Thursday evening.
One man in his 40s and two in their 20s were arrested in connection with the death.
Two men were taken to hospital and one remains there.
He is said to be in a stable condition.
The PSNI have asked for anybody with information to contact them.