The victim was taken to the Royal Berkshire Hospital following an incident on Southcote Farm Lane in Southcote, Reading, police said.
He was pronounced dead on Saturday night and a post-mortem examination is due on Monday.
A 34-year-old man who was arrested, remains in custody while police continue their inquiries.
Det Insp Dave Hubbard, from Thames Valley Police, said: "Until the post-mortem takes place tomorrow, I would not want to speculate on what occurred last night or how this man died."
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