A 39-YEAR-OLD man from Plymouth has died after he is said to have jumped into the water at Plymouth Hoe.
The incident happened on Thursday afternoon.
The man died despite an emergency rescue operation.
Police said a man was pulled from the sea but was pronounced dead at the scene despite the efforts of paramedics onshore and a search and rescue mission by lifeboat and coastguard teams.
Police are appealing for witnesses and say they are investigating the incident.
The circumstances leading up to the man jumping into the water have not yet been officially confirmed.
Sergeant Chris May, Devon and Cornwall police neighbourhood team leader for the city centre and waterfront, said: "The male was rescued from the water by the inshore lifeboat from the RNLI and treated by paramedics from the air ambulance who arrived quickly on scene.
"Despite their best efforts, the male was deceased.
"Inquiries are ongoing into the circumstances of the male's death."
Devon and Cornwall Police are asking for anyone who saw the person entering the water, or anything leading up to the incident, to come forward.
The public are asked to phone 101 quoting log number 498 of October 13.
The emergency services - including coastguard and the air ambulance - were been called to the Hoe after reports of the body of a man in the water.
Police said officers were called by South Western Ambulance Service at 3.52pm regarding the man in water off the Citadel.
Falmouth coastguard were also alerted and an air ambulance called to the scene.