The grandfather of missing Dylan Cecil has paid tribute to the search teams looking for his grandson.
David McCollum said he wanted to thank everyone for trying to find four-year-old Dylan. He said words could not express the feelings of the family.
Superintendent Keith McCourbrey of Avon and Somerset Police said:
"As you can all imagine this has been an extremely difficult time for the family who tried in vain to save him and were pulled from the water and treated by ambulance.
They have been left traumatised by the whole incident and have asked that you to respect their privacy."
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A four-year-old boy who went missing in the sea was on holiday with his family when he slipped off the end of a jetty.
Dylan Cecil's parents tried to rescue him after he entered the water in Burnham-on-Sea, Somerset, but couldn't reach him and had to be pulled from the water by passers-by.
The youngster had been on the jetty with his parents, Rachel McCollum and Darren Cecil, and his two sisters.
Police said Dylan had wanted to get closer to the sea when he slipped off the edge and went under the water.
The search for Dylan, from Kettering, Northamptonshire, is continuing, but Coastguards admit it has been altered from one for a missing child to one for a body.
A four-year-old boy who went missing in the sea while on a trip to the coast was named by Avon and Somerset Police today as Dylan Cecil, from Kettering, Northamptonshire.
A search and rescue operation for a boy believed to be from Kettering who is missing off the coast of Somerset has resumed this morning.