Police received a report of concern for a man in Town End Farm, Sunderland.
At around 3.20pm on Thursday, May 15, officers attended the scene on Baxter Road where paramedics pronounced a 39 year-old man dead.
There is believed to be no third party involvement and a report is being prepared for the coroner.
A 40 year-old man was arrested on suspicion of drug offences and has been bailed pending further enquiries.
Anyone with any information about this incident is asked to contact police on 101, quoting reference 748 15/05/14.