SIMFEROPOL, Ukraine (AP) — Associated Press journalists say hundreds of unidentified gunmen have just arrived outside Ukraine’s infantry base in Privolnoye in its Crimea region.

Unidentified armed men prepare their camp in front of Ukraine's infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen 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. (AP Photo/Darko Vojinovic)

Unidentified armed men prepare their camp in front of Ukraine’s infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen arrived outside Ukraine’s infantry base in Privolnoye in its Crimea region. (AP Photo/Darko Vojinovic)

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.

Unidentified armed men prepare their camp in front of Ukraine's infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen 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. (AP Photo/Darko Vojinovic)

Unidentified armed men prepare their camp in front of Ukraine’s infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen arrived outside Ukraine’s infantry base in Privolnoye in its Crimea region. (AP Photo/Darko Vojinovic)

Ukrainian soldiers, left and unidentified gunmen, right, guard the gate of an infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen 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. (AP Photo/Darko Vojinovic)

Ukrainian soldiers, left and unidentified gunmen, right, guard the gate of an infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. (AP Photo/Darko Vojinovic)

Unidentified gunmen guard the gate of an infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen 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. (AP Photo/Darko Vojinovic)

Unidentified gunmen guard the gate of an infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. (AP Photo/Darko Vojinovic)

Ukrainian soldiers, with clips in their weapons, have positioned a tank at the gate.

An unidentified armed man guards a gate outside of an Ukraine's infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen 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. (AP Photo/Darko Vojinovic)

An unidentified armed man guards a gate outside of an Ukraine’s infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen arrived outside Ukraine’s infantry base in Privolnoye in its Crimea region. (AP Photo/Darko Vojinovic)

An unidentified armed man stands guard outside a Ukraine infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. Hundreds of unidentified gunmen 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. (AP Photo/Darko Vojinovic)

An unidentified armed man stands guard outside a Ukraine infantry base in Privolnoye, Ukraine, Sunday, March 2, 2014. (AP Photo/Darko Vojinovic)

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