One horse has died and another is seriously injured after a stabbing attack in Northumberland.
Between 7pm on July 8 and 10am on July 9, the animals were viciously attacked while grazing in a field in Haltwhistle.
The two horses were taken to a vet where their wounds were tended to but sadly one of the animals has since died from its injuries.
The other animal is being monitored by vets as it recovers from the injuries. The owner has been left devastated by the incident.
Neighbourhood Inspector Kevin Oates, of Northumbria Police, said: "This was a cruel and brutal attack on two defenceless animals and we are determined to catch those responsible.
"Both animals were stabbed a number of times and required two vets to work together on stitching together the wounds. They were surprised the horses were still alive.
"We suspect that whoever could be responsible for such an offence would have been in a group and would have been covered in blood following the incident.
"Anyone who saw the attack, knows those responsible or has any information that could help police should contact us on 101."
Those who contact the police should quote the reference 481 09/07/16. You can also contact Crimestoppers anonymously on 0800 555 111.