RENO (CBS SF) — Protect Mustangs, a San Francisco-based nonprofit, and Citizens Against Equine Slaughter won their lawsuit against the Bureau of Land Management and the United States Forest Service to halt the government’s two-year roundup agreement.

The agreement between the USFS and the Fort McDermitt Tribe would have funded the roundup of unbranded, free-roaming horses on Humboldt-Toiyabe National Forest lands and tribal lands through May 2015.

READ MORE: Twitter To Pay $809 Million To Settle Class Action Lawsuit Brought By Investors

Anne Novak, executive director of Protect Mustangs heralded the victory and said many of the horses were ending up in kill-buyers hands.

READ MORE: KPIX Original Report: SF Mission Bay Sidewalks Sinking But City Won't Fix 'Private Property'

“It’s unfortunate the first McDermitt roundup wasn’t stopped before horses were sold at auction,” said Dr.Lester Castro Friedlander, president of Citizens Against Equine Slaughter, “but we’re glad we got rid of the underlying agreement that made the roundups possible.”

MORE NEWS: Motorcyclist Airlifted To Hospital After Crash Near Bethel Island

(Copyright 2013 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)