Chip-makers were forced to flee their factory when they discovered a hand grenade amongst the potatoes.
A 100-metre exclusion zone was set up by bomb disposal teams at McCain's factory in Scarborough, North Yorks.
The alert came just 24 hours after the tip of a wartime shell was found at the same plant. The potatoes come from fields in northern France and Belgium where relics from both World Wars are unearthed regularly.
A company spokesman said: “It is something that we will be looking into with our suppliers” “We have strict safety procedures and the safety of our workers is of paramount importance.”
The WWI grenade and shell tip were both spotted as factory workers cleaned mud off potatoes.
Obviously their strict safety procedures are not strict enough – otherwise the grenade would have been discovered sooner.