Two people have died and another two are in hospital in a stable condition after a boat got into difficulty in Bluff Harbour this afternoon.
Police said they were notified around 12.20pm that a boat was in trouble in the harbour.
A rescue operation involving police, Coastguard and ambulance staff was launched immediately between Bluff Port and Tiwai Wharf.
A St John spokesperson said two people in a critical condition were taken to Southland Hospital.
Bluff Community Board chairman Raymond Fife said he understood the boat involved was being used recreationally.