Russian soldiers have fired warning shots into the air as around 300 Ukrainian troops marched on the seized Belbek air base in Crimea.

The unarmed Ukrainian servicemen, waving flags, approached the base which has been held by Russian forces.

Around a dozen Russian soldiers warned them not to approach, before firing several shots into the air and reportedly saying they would shoot the Ukrainians if they continued to approach the base.
Warning shots fired by Russian troops in Crimea Russian soldiers confront a Ukrainian officer outside Belbek airbase.

http://www.youtube.com/watch?v=DzsZ_aDSGBY#t=206