Men wearing the uniform of Russia's Black Sea fleet, carrying automatic rifles, have taken up position outside a Ukrainian borderpost in the Crimean region.<br/> <br />It appears that the soldiers are blocking a unit of Ukrainian border guards in the Balaklava district of Sevastopol.<br/> <br />Russia's Black Sea fleet has a base in Sevastopol but Mosciow denies its forces have been involved in the mysterious movements across Crimea.<br/> <br />Armed men continued on Saturday to take over key buildings.<br/> <br />Here they can be seen taking up positions in the regional parliament of Crimea's capital, Simferopol.<br/> <br />This man is part of the group, he identifies himself as Sergei. He says he's a member of 'self-defence' militia.<br/> <br />(SOUNDBITE) (Russian) MEMBER OF 'SELF-DEFENCE' MILITIA, SERGEI, SAYING:<br/> <br />"There were no incidents near the military base here. There was an attempt by a special unit to leave the base. But they couldn't give their reasons (for leaving). We allowed units to be dispatc
