Staff members at an Australian hospital's emergency department received a rather unusual late night visitor - a koala.

The marsupial casually strolled through the automatic doors of Hamilton Base Hospital in Victoria state at about 3:30 am on April 20, said Brigid Kelly, spokeswoman for the Western District Health Service.

Surprised staff members, not wanting to put any pressure on the animal, watched from a distance as it wandered around the emergency department's waiting room for about three minutes before showing itself back out.