Authorities say a pair of dogs have killed 10 alpacas and injured a llama on a farmstead in south-central Kansas.

Reno County Sheriff’s Sgt. Troy Selby says that the attack happened Thursday night in western Sylvia. The Hutchinson News reports that farmstead owner Michael Murphy fatally shot one of the dogs, and authorities were searching for the other one.

The alpacas that were killed were among about 100 Murphy owns. They suffered lethal wounds to their necks, heads and hindquarters when the dogs got in through a crack in a fence.

Murphy says he has lost two other animals in separate dog attacks since owning the land. He called the killings Thursday night “terrible.”

The sheriff’s office is investigating who owns the dogs.