A six-year-old girl from south-east London has died after going into the sea at Margate Harbour, police said.
Emergency services were called to the seaside town in Kent amid concerns for a child in the sea.
The girl, from Erith, was rushed to hospital from the harbour on Saturday afternoon.
The South East Coast Ambulance Service and the RNLI were part of the rescue effort.
A spokeswoman for the ambulance service said the girl had been taken to the Queen Elizabeth The Queen Mother Hospital in a serious condition.
Kent Police confirmed in a statement on Sunday that she had died.
The force added: "Her next of kin have been informed.
"There are no suspicious circumstances and a report is being prepared for the coroner."
It is the latest death in recent days concerning people in difficulty in the water.
Two bodies were recovered on Saturday in separate incidents.
The body of a 15-year-old teenager, provisionally named as Ben Quartermaine, was found near Clacton Pier in Essex after a search which began on Thursday.
In Bedfordshire the body of a man aged in his late 20s was recovered from the Great Ouse river after reports someone had got into difficulty there on Friday afternoon.
Additional reporting by Press Association.
