Three men have been questioned on suspicion of murder after a man's body was found in a reservoir at a popular beauty spot.
Police discovered the body near a path popular with walkers in the Yarrow reservoir in Hodge Brow near Rivington, Lancashire, in the early hours of Tuesday.
The victim has not yet been formally identified.
Detectives continue to question a 37-year-old man, while the other two men, aged 34 and 29, were released on bail pending further inquiries.
Detective Superintendent Jon Chadwick, from Greater Manchester Police, said: "As part of an investigation being carried out by the Major Incident Team, we have this morning recovered the body of a man from a reservoir in Lancashire.
"We have made three arrests in connection with this man's death, which we are treating as a murder, and our enquiries remain very much ongoing to establish the events leading up to this man's tragic death.
"We are appealing for anyone who may have any information that may assist police with their enquiries to please get in touch with us and tell us what they know.
"We will provide updates to the public on this investigation as soon as we have more details that we can release."