Three lambs, that were bought as pets for a primary school, have been found skinned and slaughtered near Hall Farm, following a reported burglary.
The farm, which had three adult sheep go missing last month, is believed to have been broken into between the hours of 6 pm on Friday and 7 am on Saturday, March 2.
Jamie Quin, who runs Hall Farm, said: "Our three tame case lambs bought for the local school farm and one of our pedigree Lincoln Longwools [were] stolen from the farm...and slaughtered in the field opposite - skins left for us to find.
“I am currently in bits. This behavior is unacceptable”.
The triplet lambs - Ethel, Chunk, and Ugs - which had to be bottle-fed with formula milk as their mother 'could not feed them all', were bought specifically for a school project.
'A very upsetting incident'
Humberside Police said: "This is clearly a very upsetting incident and the theft of livestock from farms is a serious matter. We are investigating this case, looking for forensic evidence and viewing CCTV to try and identify those responsible.
"We have increased patrols in the area and would ask that anyone who sees anything suspicious to call us, we want to catch those responsible and prevent further rural crime."