WASHINGTON (WJZ) — Six lions, a Sumatran tiger and two Amur tigers have tested presumptive positive for COVID-19, the National Zoo in Washington, D.C. announced Wednesday.

The Zoo said the animals were observed coughing and sneezing in the animals, they were also lethargic and had decreased appetites. Testing of fecal samples tested presumptive positive, but final results are expected in the next few days.

READ MORE: 'When I Finally Got To Be Elvira, That's When My Life Calmed Down': Mistress Of The Dark Peels Back The Curtain

The lions and tigers are being treated with various medications for their discomfort and appetite, and they remain under close observation.

READ MORE: WATCH: Ghosts of Ybor City | 5 Part Series

The zoo said the public is not at risk given the distance between the animals and visitors. No other animals are showing signs of infection, officials said.

An investigation of staff in close proximity of the tigers and lions did not result in any evidence to pinpoint where the infection came from.

MORE NEWS: Atlanta Police Officer Recovering Months After Drunk Driver Slammed Into His Patrol Car

Some select animals are set to be vaccinated against COVID-19 when a specialized vaccine becomes available in the coming months, the zoo said.