Associated Press journalists say hundreds of unidentified gunmen have just arrived outside Ukraine's infantry base in Privolnoye in its Crimea region.
The convoy includes at least 13 troop vehicles each containing 30 soldiers and four armored vehicles with mounted machine guns. The vehicles — which have Russian license plates — have surrounded the base and are blocking Ukrainian soldiers from entering or leaving it.
Ukrainian soldiers, with clips in their weapons, have positioned a tank at the gate.
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