SYDNEY—Australia on Thursday said it had begun an investigation to decide whether social media giant Facebook Inc breached its privacy laws, after the company confirmed data from 300,000 Australian users may have been used without authorization.
Personal information of up to 87 million users, mostly in the United States, may have been improperly shared with political consultancy Cambridge Analytica, Facebook said on Wednesday, exceeding a media estimate of more than 50 million.
