Australia news live: three dead and man arrested in Sydney; Liberals claim seat of Nepean in key Victorian byelection (opens in new tab)

Man, 32, arrested in the early hours of Sunday morning after incident in Rosemeadow. Follow updates liveGet our breaking news email, free app or daily news podcastThe Liberal party has claimed victory in a key Victorian byelection seen as a preview of what to expect when the rest of the state hits the polls in November.As counting continued in the Mornington peninsula seat of Nepean, the Liberal candidate, Anthony Marsh, appeared to be in a commanding position in a significant boost to opposi...