South Australian health authorities are investigating after two men tested COVID positive. A man in his 40's returned a positive test in the Stamford Hotel and it is suspected he may have contracted the virus from another man staying in a room across the hallway who was believed to be an old, 'non-infectious' case. Five other people staying on the same floor of the hotel have been ordered to do an additional 14 days of quarantine. The pair have been moved to Tom's Court medi-hotel while authorities investigate the transmission.