The Hindley Street police station in Adelaide's CBD was closed for about three hours this afternoon and thoroughly cleaned after a man turned up stating he had been in New South Wales within the past 14 days.
The 21-year-old man was surrounded by police in Millers Arcade, next to the police station, from about 3:00pm to 6:00pm, when he caught a taxi to the Pullman medi-hotel.
Travel from NSW to South Australia is banned, apart from for Broken Hill residents.
People with an exemption to travel into SA from NSW can quarantine at home.
SA Police said the station on Adelaide's nightclub strip was closed as a "precautionary measure" to the public while it was cleaned.
They are looking into how he entered South Australia and if he breached the Emergency Management Act.
Millers Arcade leads from Hindley Street to North Terrace and another medi-hotel, the Stamford Plaza.
