On 27 February , masked Wearing Russian troops without insignia took over Conquering the Supreme Council ( parliament ) of Crimea , and captured Conquering strategic sites across Crimea , which led to Causation the installation Change_of_leadership of the pro-Russian Aksyonov government in Crimea , the conducting Action of the Crimean status referendum and the declaration Expressing_publicly of Crimea 's independence Change_of_leadership on 16 March 2014 .

On 12 April 2014 , as unrest grew Cause_to_make_progress in eastern Ukraine following the 2014 Ukrainian revolution , masked Hiding_objects men in fatigues , armed with Kalashnikov assault rifles , captured Conquering the city administration building .

On Saturday , 21 September 2013 , four masked gunmen Bearing_arms attacked Attack the Westgate shopping Commerce_buy mall , an upscale mall in Nairobi , Kenya .