A desperate search has been launched to find a child who fell into the river Calder in Yorkshire.
Police confirmed officers had been called on Tuesday afternoon and that it was an "ongoing incident".
Divers are currently scouring the river, in which dozens of children were reportedly seen playing earlier.
Emergency services rushed to the scene at Brighouse at around 2:40pm, reports Yorkshire Live.
A unnamed witness arrived at the scene at 2:45pm told the publication they saw officers and firefighters jumping into the river.
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He said: "I didn't see the person fall in but I saw all the police cars go down Armytage Road as I was at my friend's on George Street so I drove down.
"I saw the fire crews and police crews jumping into the river looking for the person."
Another witness reported seeing a group of men trying to get into the river, before they were restrained by officers.
A spokesperson for West Yorkshire Police said: "Police were called at 2.38pm to reports of a child in the River Calder in Brighouse.
"Officers are currently at the scene with various partner agencies and this remains an ongoing incident."
The incident follows several others on Britain's waterways over the Bank Holiday weekend, including the death of a teenager.
Thames Valley Police confirmed on Tuesday that the body of a teenage boy had been found in the river Thames after a search.
The force had been called on Monday afternoon to reports that a person had entered the water between Bourne End, Buckinghamshire and Cookham, Berkshire but not emerged.
Tragically, the teenager's body was later discovered by divers.
The death is being treated as unexplained but not suspicious, a statement added.
