A man was arrested following a non-suspicious death at a house in Lancaster.
The arrested man was held on suspicion of being concerned in the supply of a Class A drug.
He was released on police bail, without charge, until July 23.
Police were called to a house on Mayfield Avenue on the Vale estate at around 3am on Wednesday.
A spokesman for Lancashire Police said the dead man, 38, would not be officially named until relatives had been informed.