Police in New South Wales have appealed for information as they investigate a walking trail littered with corks that had spikes protruding from them.
They were discovered by a passerby in Toronto, Lake Macquarie in New South Wales.
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Thankfully no one has succumbed to injury from the homemade booby trap, but it hasn't been ruled out that other similar devices may have been placed elsewhere.
NSW Police have released a statement, saying: "Officers have been told the man was running the trail about 11.40am when he noticed a pile of leaves piled in the middle of the track.
"Hidden in the leaves the man found wine corks with nails protruding from them, similar to historic weapons known as 'caltrops'.
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"The man continued along the trail and found a further two piles hiding more spikes. Officers from Lake Macquarie Police District were notified a short time later and attended the location.
"An investigation into the circumstances surrounding the items has commenced and police are urging anyone who may have information or noticed suspicious activity in the area to contact Toronto Police Station."
Caltrops were used were used by the Romans to 'slow the advance of troops especially horses, chariots, war elephants and camels'.
If you're in the area, please be vigilant.
Featured Image Credit: NSW Police