FILE PHOTO: Police officers patrol near the Sydney Harbour Bridge following the implementation of stricter social-distancing and self-isolation rules to limit the spread of the coronavirus disease (COVID-19) in Sydney, Australia, April 6, 2020. REUTERS/Loren Elliott

MELBOURNE: Australia's coronavirus-related death toll rose by three to a total of 68 on Saturday (Apr 18), health data showed, with the government stepping up its calls for people to sign up for a controversial movement-tracking mobile phone app.