Received a call from this number (+65 8528 7011), which played an automated voice message claiming to be from MOH and that I have been a close contact of a person infected with covid-19. it asked me to press the number '3', after which someone picked up the call and started speaking in Mandarin which (fortunately) I didn't understand). I felt it was suspicious firstly because of the +65 in the number, and also because of how the person sounded unprofessional.