A dog in Hong Kong has tested positive for the COVID-19 virus that's killed at least 2,859 humans across the world over the last two months, World Health Organization officials said Friday.

Dr. Maria Van Kerkhove, the technical lead of WHO's emergencies program, said the canine tested "weakly positive," meaning low levels of the virus were found.

Hong Kong scientists aren't sure if the dog is actually infected or if it picked up the virus from a contaminated surface, she said.

"We're working with them to understand the results, to understand what further testing they are doing and to understand how they are going to care for these animals," Kerkhove said during a press conference at WHO's headquarters in Geneva.

The dog reportedly belongs to a 60-year-old woman who developed symptoms on Feb. 12 and later tested positive, according to The Wall Street Journal. Hong Kong's Agriculture, Fisheries and Conservation Department said the dog doesn't have any symptoms. Swabs of its nasal and oral cavities tested "weak positive," it said in a statement Friday. The dog is under quarantine at a facility at a port in Hong Kong and will be returned to the owner once it tests negative for the virus, according to the agency.

As a precaution, the Hong Kong government said it would quarantine all cats, dogs and other domesticated animals in a holding facility if their owners test positive and were quarantined for COVID-19.