Two 11-week-old white tiger cubs that died in Lahore Zoo last month appear to have died of COVID-19, zoo officials have said.

According to reports, the cubs died on January 30, four days after beginning treatment for what officials thought was feline panleukopenia virus, a disease that zoo officials said is common in Pakistan and targets cats’ immune system.

But an autopsy found the cubs’ lungs were badly damaged and they were suffering from severe infection, with pathologists concluding they died from COVID-19.

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Although no PCR test for the new coronavirus was conducted, zoo deputy director Kiran Saleem told Reuters the zoo believes the cubs were the victims of the pandemic that has killed 12,256 people in Pakistan.

“After their death, the zoo administration conducted tests of all officials, and six were tested positive, including one official who handled the cubs,” Saleem said. “It strengthens the findings of the autopsy. The cubs probably caught the virus from the person handling and feeding them.”

Pakistan’s zoos regularly draw the ire of animal rights activists, who say hundreds of animals have died from poor living conditions there.

“The last two white tiger cubs have died at Lahore zoo and once again the negligence of the management and authorities has come out,” said Zufishan Anushay, founder of JFK (Justice for Kiki) Animal Rescue And Shelter.

“White tigers are extremely rare and need a specific habitat and environment to live a healthy life. By caging them in unhygienic conditions with no medical arrangements, we will keep witnessing these incidents,” she added.

However, Saleem rejected the allegations of neglect at the zoo, saying that animal rights activists were welcome to visit and check the facility’s safety and hygiene protocols themselves.