Sydney hostage siege ends after armed troops storm cafe
  
    
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Police
 officers position themselves at a corner near Lindt cafe in Martin 
Place, where hostages are being held, in central Sydney December 15, 
2014.(Reuters / Jason Reed)
 
 
Up to 40 hostages are being held by an unknown 
individual at a café in central Sydney, Australia. A black jihadist flag
 was reportedly spotted at the site. Authorities have cleared the 
airspace over the city center to make way for police helicopters.