A flock of 'alien' sheep has become a local attraction in a Romanian village after all 250 turned green overnight.

The owner of the sheep, in the village of Arsa from Constanta county, called the vet to see what was wrong with his animals.

Locals came flocking to see the unusual sight while the local vet took samples from the sheep wool and discovered they had all been treated with a solution of limestone.

The shepherd said he used the solution to help a few animals get rid of a skin disease.

Shepherd Cristinel Florea said: "A few of my sheep got sick one year ago, they got a sort of rash on their skin.

"I tried all sorts of treatments but nothing seemed to work. So I decided to use the limestone and all my sheep look like aliens now."

Vet Grigore Mertoiu said: "Everyone was puzzled at first but then the owner told us he used limestone to treat his sheep.

"The poor animals turned all green during the night because it was a little chilly and they slept very close."