THESSALONIKI, Greece (AP) — Authorities in Greece say that a Bulgarian woman has been killed and her husband hospitalized after diving to a great depth off Greece's northern coast.

Greece's coast guard reported her death Sunday, and said her husband was transferred by helicopter to a hospital in Thessaloniki which has a unit to treat divers' decompression sickness.

A staff doctor told The Associated Press on condition of anonymity that the 47-year-old man who survived said that he felt sick at a depth of about 230 meters (750 feet).

His 45-year-old wife, who was with him, became unresponsive and was pulled to the surface from 60 meters (200 feet) down. Despite efforts to revive her, she was pronounced dead. The man took about three hours to come to the surface, following decompression protocol.