7 minutes ago George Thorpe,Devonand Dan Johnson,Sourton PA Media The Royal Navy confirmed three personnel died in the crash in Sourton, near Okehampton Investigations are continuing into a helicopter crash in which three Royal Navy personnel died during a training exercise. Accident investigators and emergency services remain at the scene in a field in Sourton near Okehampton, Devon, following the incident which happened at about 03:45 BST on Wednesday.