A koala made an unexpected visit to a train station in Australia, prompting a brief police operation, government agency Transport for New South Wales (NSW) reported on Tuesday. Footage released by the agency shows a koala wandering the platform at Casula Station near Sydney in the early hours of Friday morning. “While it took a self-guided tour of the station, a train guard notified the Security Control Centre, and incoming trains were warned to slow down when passing through the area,” Transport for NSW said in a post on Facebook. “With the guidance of some NSW police officers, it found its w…