A 17-year-old died after an inflatable boat capsized in Cornwall on Bank Holiday Monday, Devon and Cornwall Police have said.
The incident was one of three along the Cornish coastline on Monday 25 May, following warnings from the RNLI about the absence of lifeguards on beaches.
Police officers were called to reports that a boat was upturned near Wadebridge at around 2.25pm.
The air ambulance and coastguard attended the scene and took three casualties to the Royal Cornwall Hospital.
The 17-year-old girl, who is local to the area, was later pronounced dead.
Her next of kin have been informed.
Devon and Cornwall Police is now appealing for any information about the incident, following what has been described as an "exceptionally busy weekend" for the force.
On Twitter Assistant Chief Constable Glen Mayhew thanked everyone who worked hard over the Bank Holiday to save lives.
In a separate incident on Monday a man died at Treyarnon Bay in Padstow after he was pulled from the water by a member of the public.
Another man was rescued by surfers in Porthtowan, Truro, and taken to the Royal Cornwall Hospital where he is still receiving treatment for “life-changing injuries”.
In recent weeks the RNLI has warned people ahead of the warm weekends that there are currently no lifeguards on beaches because of the pandemic.
The roll-out of the normal service was paused at the end of March following the outbreak.
It is hoped the charity's lifeguards will be back on 70 beaches by peak season. These will be chosen based on risk and popularity.