Man dies in Bletchley Blue Lagoon lake fetching ball
A 61-year-old man has died following a "medical episode" while trying to fetch a ball from a lake in Buckinghamshire.
The man was pulled from the Blue Lagoon Lake, near Bletchley, at about 18:40 BST on Friday, but paramedics were unable to save him.
The incident has led to renewed calls from police urging the public to be aware of the dangers of open water.
Det Insp Matthew Darnell said: "This was a tragic incident... and our thoughts are with this man's family."
Police cordoned off an area at the site while they carried out an investigation into the man's death, which is being treated as unexplained.
Mr Darnell said: "We would urge people to be aware of the hazards of getting into open water such as lakes, reservoirs and rivers, no matter how tempting it must be in the hot weather.
"Inland waters can be very cold no matter how warm the weather is, which can lead to cramp and breathing difficulties so we would urge people to take great care and be aware of the dangers before going in."
The incident follows the deaths of three teenage boys earlier in the week.
Kyrece Marshall, 13, died on Tuesday while trying to retrieve a ball from the River Thames in Buckinghamshire.
The body of Rony John, 15, was recovered from the River Great Ouse in Cambridgeshire in the early hours of Friday morning.
The body of 16-year-old Conor McColl from Luton was recovered from a lake at a former Fuller's earth quarry at Clophill on Friday.