Thames Valley Police is investigating an unexplained death in Aylesbury.
The force received a call from a member of the public at 3.30pm on Saturday reporting a man was in the Grand Union Canal near Broughton Crossing off Broughton Lane.
Police officers attended the scene and the man was pulled from the water.
Police officers and the South Central Ambulance Service treated the man at the scene, but sadly he was later pronounced deceased.
The man’s next of kin have been informed.
Investigating officer, Detective Inspector Michael Anderson said: “This is a tragic incident in which a man in his thirties has lost his life.
“Our thoughts are with the man’s family at this extremely difficult time.
“Thames Valley Police is investigating the circumstances of the man’s death, but at this time it is being treated as an unexplained death with no suspicious circumstances.
“We put a cordon in place on Saturday to ensure we could carry out enquiries at the scene. This cordon was lifted in the early hours of Sunday morning.
“I would like to thank the local community for their cooperation and support while our officers and staff attended the scene.”