A snake-catching company had to be called to a COVID testing facility in Australia after multiple venomous snakes were found on the premises.

The testing site in Sydney was temporarily closed while a snake expert arrived to remove the reptiles and later searched the area to make sure they were gone.

The reptiles in question were red-bellied black snakes, a familiar species in eastern Australia.

Sean Cade, the owner of the Australian Snake Catchers group that helped remove the snakes, told Australian news outlet 9News that staff first saw a "medium-sized snake" on Friday last week followed by a couple of baby snakes on Monday. He said the influx of snakes may have been caused partly by improved weather conditions.

A video posted on the Australian Snake Catchers group's Facebook page via Cade showed one of the snakes being coaxed out from beneath a bin before Cade picks it up by the tail and holds a collection bag open for it.

Cade told Newsweek the snake that was filmed was later released elsewhere, and that "all snakes and reptiles are protected by law in Australia".

He added: "It is the first testing center that has been closed due to a venomous snake that I have attended.

"These snakes are considered capable of inflicting a fatal bite, even as a baby."

The Australian Museum described red-bellied black snakes as a "medium-sized snake" and stated that they are usually associated with moist habitats like streams, swamps, and lagoons—though they may also be found far away from such areas. They occur across eastern Australia, including in parts of Queensland through New South Wales and Victoria.

They are one of the most frequently encountered snakes on the east coast of Australia and are responsible for a number of bites every year. The Australian Museum stated that red-bellied black snakes are "a shy snake and will generally only deliver a serious bite under severe molestation." People may unwittingly get quite close to them as they often freeze to avoid detection in the wild.

Per the museum, symptoms of the snake's venom may include bleeding or swelling at the bite site, nausea, vomiting, headache, abdominal pain, diarrhea, sweating, muscle pain and weakness, and red-brown urine. It is advised that all suspected bites should be treated as serious and that medical attention should be sought as soon as possible.

Red-bellied black snakes eat a variety of prey, including fish, frogs, mammals, and even other snakes.

Earlier this year, as Newsweek previously reported, a study was released suggesting that the ancestors of some of Australia's most deadly snakes may have arrived on the continent by swimming there.

The researchers compared the genes of Australian elapids—venomous snakes with hollow fangs—with sea and amphibious snakes in Asia. They said their work determined the genetic differences between land snakes, sea snakes and amphibious snakes.

A stock photo shows a red-bellied black snake curled up. The species is found across eastern Australia.sjallenphotography/Getty