Monis yelled at cops after killing hostage

Sydney siege hostage Tori Johnson was executed by gunman Man Haron Monis in a close range blast from a sawn-off shotgun, the Nine Network reports.

As police moved on the Martin Place cafe where Monis had kept his hostages for 16 hours, the gunman screamed "look what you've made me do" at officers, Network Seven reported.

It's still unclear how the other hostage Katrina Dawson died and police are waiting on forensic reports to assist their investigation.