BILLINGS, Mont. (AP) — At least 96 bison attempting to migrate from Yellowstone National Park into Montana have been captured for potential slaughter under a program meant to shield livestock from disease.

Park officials said Tuesday the animals were captured under an effort to cull up to 900 of Yellowstone's 4,800 bison this winter. Some of the animals could be relocated instead of slaughtered.

The population reduction program is intended to stop transmissions of brucellosis, a disease that can cause infected pregnant animals to abort their young.

About half of Yellowstone's bison test positi...