The Royal Navy Bomb Disposal Squad from Devonport was called in to carry out a controlled explosion in Boscastle yesterday, after a hand grenade was discovered in a garden in the North Cornwall village.
A Royal Navy spokeswoman said that the grenade was found at the bottom of a garden by the Environment Agency, which is carrying out some flood defence work in the area. They then alerted the Royal Navy.
"It was pretty rusty and they couldn't determine what it was," she said. "The petty officer in charge of the team deemed it not safe to move back to Plymouth."
Instead, the grenade was taken to cliffs at the end of the harbour and safely disposed of.
The spokeswoman added that it was not possible to say where the grenade had come from, or how it had ended up in the Boscastle garden.