Police are appealing for witnesses following the sudden death of a man in Littlehampton.
Officers were called to River Road around 4.45pm on Friday 13 September following concerns for the welfare of a 33-year-old local man.
He was taken to hospital for treatment, where he sadly later died.
His next of kin were informed and have been supported by specialist officers.
A 20-year-old man from Littlehampton and a 40-year-old woman from Wick were arrested on suspicion of supplying a Class A drug.
Both suspects have been released on conditional bail as enquiries continue.
In the meantime, police are urging anyone with any information about the incident to report it online or call 101, quoting crime reference 47240178904.