A major search and rescue operation is under way after a swimmer has gone missing in a charity race according to the Maritime and Coastguard Agency.
One person remains unaccounted for after earlier reports that 90 people had not checked in after the race off the coast of Southwold.
Four lifeboats and a rescue helicopter were involved in the operation after being called at ten past one.
Two people were taken to Paget University Hospital in Gorleston with suspected hypothermia, the spokeswoman added.
Coastguards are now urging any swimmers involved in the race who have not reported to them to get in contact.