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 showing 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.

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 showing 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.