Several monkeys had escaped following Friday's collision, Pennsylvania State Police said. But only one had remained unaccounted for as of Saturday morning, prompting the Pennsylvania Game Commission and other agencies to launch a search for it amid frigid weather.

Kristen Nordlund, a spokesperson with the federal Centers for Disease Control and Prevention, said in an email Saturday evening that all 100 of the cynomolgus macaque monkeys had since been accounted for. Three were dead after being euthanized.