It's believed two people who died at Bawsey Pits near King's Lynn were a 16 year old teenager from London who was living in Ely and a 40 year old man from King's Lynn.
The emergency services are due to hold a press conference in the next half an hour. We'll bring you more details as we get them.
Two people have died in separate incidents which have prompted fresh warnings over the dangers of swimming in open water.
The dangers of cooling off in the heatwave have been highlighted after the bodies of two men were recovered from water spot in Norfolk.