One of 20 people taken hostage inside a Sydney cafe this morning has been seen running her thumb across her throat.
Amateur footage from Martin Place in the CBD shows the woman make the gesture as she and other hostages are forced to stand against the windows of the Lindt cafe.
It's been suggested the hostages were made to make the gesture by their captive, believed to be a solo gunman holding a handgun.
The hostages have also been forced to hold a black Islamic flag in the cafe's window reading "no god worthy of worship except Allah and Muhammad is his messenger".
The alarm was raised about 9.45am after witnesses saw the armed man.
Heavily-armed police have shut down large areas of the CBD.
Read more at http://www.9news.com.au/national/2014/12/15/11/48/female-hostage-seen-running-thumb-across-her-throat-in-sydney-cbd-cafe#HHepJzvcp6gwzt00.99 We don't see this often in Australia, but when we do I think we stop as a nation and take a deep breath in. I hope those hostages will be safe and it will end soon. I cant imagine what they are going through. I can tell you now they will never be the same again. Prayers, love and hope to you all.