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Associated Press
FILE - In this March 8, 2012 file picture Siberian tigers (Panthera tigris altaica) "Altai" left, and "Hanya"  in their enclosure in the Cologne Zoo.  'Altai'  escaped the  enclosure at Cologne Zoo in western Germany on Saturday Aug. 25, 2012  and killed a female keeper before being shot dead by the zoo's director, police said.  The tiger managed to get from the enclosure to an adjacent storage building, where it attacked the 43-year-old keeper, said police spokesman Stefan Kirchner.  "It appears the gate wasn't properly shut," Kirchner told The Associated Press. The zoo's director used a rifle to shoot the animal dead through the storage building's skylight before it could make its way to the visitor areas, he added.  (AP Photo/dapd/Roberto Pfeil,File)

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