The Bureau of Land Management (BLM) is continuing its investigation into the deaths of 21 domestic horses that had been abandoned on public land in a remote area northwest of Thermopolis, Wyoming.

Joe Nardinger, a BLM special agent, confirmed that the horses were shot and that investigators are working with cooperating agencies to follow up on leads.

“The assistance we have received from the Hot Springs County Sheriff’s Office has been invaluable to this investigation,” said Nardinger.

In addition to the $2,000 reward the BLM is offering, The Humane Society of the United States is offering a reward of $5,000 for information leading to the identification, arrest, and conviction of the person or people involved in the horses’ deaths