Chief Superintendent Phil Booker, of Humberside Police, said: “After receiving the report, officers were immediately deployed alongside other emergency services and upon attending, it was discovered that a 13-year-old boy had reportedly got into difficulty whilst swimming in the water.
“Our priority now is to find the boy, and members of the public can expect to see specialist Police Search Advisors (POLSA), along with our Marine Unit and drone pilots, who have also been deployed to conduct an extensive search and rescue operation to locate him.
“We would urge people to please avoid the area where possible to allow emergency services to work efficiently and safely, and refrain from speculating on the circumstances of the incident.
“Our enquiries continue to ascertain the full circumstances around the report, and we would ask anyone with any information that may assist us, to please speak to the officers in Hornsea, or contact us via our non-emergency number 101 quoting log 415 of 4 August.”