Guernsey Police said specialist officers did the work and there has been no risk to the public.
The explosion was carried out this afternoon, and Guernsey Police have since confirmed it was a “nearly entirely intact 105mm German artillery round”.
“Earlier this week a member of the public identified and reported a piece of unexploded ordnance on the Lihou side of the causeway and reported it to JESCC,” a spokesperson said.
“Specialist EOD officers attended to locate the ordnance, and it was detonated today.
“It was believed to have been a nearly entirely intact 105mm German artillery round from the Second World War. It was detonated safely to dispose of it and remove any risk to the public.”
It’s not the first time unexploded ordinance has been found on or near Lihou, with similar occurrences off Guernsey’s east coast as well as other places across the Channel Islands.
When a mine was detonated in the Russell earlier this year it set off earthquake monitors.
This safe detonation came just days after an incident in Jersey which saw the island’s police station evacuated after a member of the public took in some unexploded rounds from WWII which they had found.
The island’s Bomb Disposal Officer (BDO) was called to safely remove and discharge the devices elsewhere.
This went in the face of official advice if unexploded ordinance is found as it should be left in situ and the police called out, rather than the item being taken to the police themselves.
The Guernsey Police website states: “If you find anything that you think may contain explosives, please do not touch or move it.
“Make sure you and anyone near you is safe and telephone the Police on 725111 or in an emergency, call 999.”
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