Authorities say the remains of at least 117 dogs have been found on the grounds of Miranda’s Rescue Animal Sanctuary in Fortuna, northern California. The Humboldt County Sheriff’s Office describes the discovery as part of an investigation into animal cruelty and is conducting searches of the property. Investigators report that many of the dogs show signs consistent with gunshot wounds, including bullet fragments found in some remains. Other details reported across outlets include the discovery of canine skulls, hundreds of bones, and additional remains as searches continue.

Separately, officials also found large numbers of dog collars on or around the area where investigators suspect the animals were killed or buried. One outlet reports more than 600 collars were located in that area.

The sanctuary, which described itself as a “no-kill” facility, has been identified as receiving hundreds of dogs each year from shelters in the San Francisco Bay Area in exchange for funding, according to reporting summarized by multiple outlets. No specific charges or suspects are detailed in the provided accounts.