The Ministry of Defence said the incident happened just before 4am on Wednesday.
Three members of the Royal Navy have died after a helicopter crashed into a field during a training exercise.
The Ministry of Defence said the incident happened just before 4am on Wednesday, with images emerging of the destroyed aircraft at the scene.
Police said emergency services were notified at around 3.45am after reports of a crash at Sourton Down, near Okehampton, Devon.
The head of the Navy, General Sir Gwyn Jenkins, said in a statement: “I know this will come as a huge shock to all in our naval community, and my deepest condolences go out to the families, friends and loved ones impacted by this tragedy.”
