The pandemic has claimed three more lives.

The three snow leopards at the Lincoln Children’s Zoo in Nebraska died from COVID-19 complications.

In October, the leopards and two Sumatran tigers tested positive for the virus and were treated with steroids and antibiotics. While tigers Axl and Kumar recovered, leopards Ranney, Everest and Makalu succumbed.

“It is very tough to lose any animal unexpectedly, especially one as rare and loved as the snow leopard,” a zoo spokesperson told local 1011 News.

The zoo remains open to the public.