A man died yesterday after falling into the water at Clattercote Reservoir near Banbury.
Police and paramedics were called to the scene at 10.25am.
Police spokesman Chris Kearney said: “The man was unresponsive and pronounced dead at the scene.”
The death of the man, known to be from Banbury, is not being treated as suspicious.
Police were last night unable to confirm his identity or his age.