Images of the bodies, buried as part of the country’s coronavirus cull, have gone viral on Twitter after they filled with gas and rose to the surface. Police are reburying the animal carcasses after the natural phenomenon at a military training ground.
Thomas Kristensen, a national police spokesman, told state broadcaster DR: “As the bodies decay, gases can be formed.
“This causes the whole thing to expand a little. In this way, in the worst cases, the mink get pushed out of the ground.”
Social media users responded to reports with jokes about a “zombie mutant killer minks” uprising.
Melissa Combs wrote: “Wow! I didn’t have Zombie minks on my 2020 Bingo card.”
Lainey Mac asked: “Are we ending 2020 on a mink zombie apocalypse?”
Stefan Bøgh-Andersen wrote: “2020, the year of the zombie mutant killer minks.”
Nicolai Nielsen wrote: “Run… The zombie minks are coming.”
Police in the West Jutland region of Denmark are reported to be placing soil onto the corpses in a bid to conceal them, with some animals buried three feet down.
The Danish government announced a cull of between 15 and 17 million mink earlier this month to curb the spread of coronavirus.
Denmark is the world’s biggest mink producer with the animals being bread for their fur.
It farms up to 17 million of the animals but the coronavirus has hit 1,000 mink farms.
Authorities fear a mutated strain of Covid-19 found in mink could hinder the effectiveness of a future vaccine.
Demonstrators drove hundreds of tractors into central Copenhagen on Saturday to protest about the handling of the mink crisis, while rallies have taken place in other parts of the country.
France has also ordered the culling of 1,000 minks after coronavirus was detected in a farm’s population.
The French government said all animals at a farm in the Eure-et-Loire region will be culled.
Authorities have commenced testing at a number of farms.