An air and sea search is under way for a person believed to be missing in the water after a boat capsized.
The Coastguard said the alarm was raised after two people were found holding on to the side of an overturned boat in Poole Harbour, Dorset. The men were rescued by helicopter and taken to Poole Hospital.
Lifeboats are now working alongside the Coastguard helicopters in an "intensive" search for a third person believed to have been on board.
A spokesman for the Coastguard said: "We are in the middle of a major incident. Two people have been recovered from the water in Poole Harbour by coastguard rescue helicopter and transferred to hospital.
"An intensive search is ongoing for a third person believed to be missing in the water after a small boat capsized this morning."
The boat capsized near Brownsea Island and members of the public on the shore dialled 999.
Dom Fraser at the North Haven Yacht Club at Sandbanks told the Bournemouth Echo he understood the three people had been in a dinghy.
He said: "Around 10.45 I heard people shouting for help. I was about to row over but then the helicopter arrived.
"The water is quite shallow where it happened, to the point where you can stand up."
The search for the missing man was later called off following an "intensive three hour search" of the harbour, the Coastguard said.