An Australian coroner says police failed to act quickly enough in a Sydney cafe siege in 2014 that left three people dead.<br /><br /> Gunman Man Haron Monis held hostages for 16 hours before opening fire inside the cafe with a warning shot. <br /><br /> The New South Wales State Coroner, Michael Barnes, said: <br />“I conclude that after a brief period to allow officers to gather relevant information, an emergency action ought to have been initiated following Monis’ first shot at 2:03 am. <br /><br /> “The ten minutes that elapsed without decisive action by police was too long. <br /><br /> “Tori Johnson was executed in the meantime, before police had made a decision about whether to enter the cafe.”<br /><br /> Tori Johnson, the manager of the cafe, was among 18 hostages. <br /><br /> Lawyer Katrina Dawson was killed by fragments of a bullet fired by police.<br /><br /> Officers shot and killed the gunman, who had reportedly sworn allegiance to ISIL not long before his attack.<br />