First published on Tue 25 May 2021 21.02 EDT Victorians are bracing for additional Covid-19 cases as other states closed their borders and warned residents to avoid traveling to Melbourne. Victoria’s acting premier, James Merlino, said on Wednesday that the next 24 hours would be critical after the state recorded six new local cases, taking the cluster to 15 in total. The government has held off on imposing further restrictions, so far, but wouldn’t rule out a tougher stance including a potential lockdown. The state’s chief health officer, Prof Brett Sutton, is concerned about the amoun...