28 September 2012 Last updated at 16:30 ET

WWII parachute mine in Helford River to be detonated

The device underwater at the mouth of the Helford. Pic: Mark Milburn A group of local scuba divers found the device

A parachute mine found in a river near Falmouth is expected to be detonated on Saturday.

A Royal Navy Bomb Disposal Unit said the device, which contains more than 700kg (1,540lb) of explosives, is one of the biggest found in South West England.

A member of a group of local scuba divers found the World War II device at the mouth of the Helford River.

A spokesman from the unit said a one mile exclusion zone would be set up.

He said part of the Helford River would also be closed during the detonation.

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