Ukrainian commanders appeared resigned to the seizure of their base, but Ukraine's government vowed not to pull its troops from Crimea, which voted Sunday to join Russia.
If sanctions related to Russia's annexation of Crimea intensify, Russia may speed efforts to boost its industrial and energy ties in Asia.
Europe has sanctioned Russian individuals in response to the Crimea crisis, but it confronts an inescapable fact when it comes to targeting Russia's natural gas and oil exports.
Reactions in the region have ranged from name calling to accusations of Russian meddling to observations of declining world powers.
Officials announced that Sunday's referendum showed 96.77 percent support to break away from Ukraine and join Russia – a tally that seems dubious.
Adm. James Stavridis added that serious financial sanctions on Russia should also be considered.
A Yanukovych ally, Dmitry Firtash, was arrested Thursday in Austria at the request of the US. But corrupt and powerful oligarchs can be found in all camps.
Crimea cancels flights as pro-Russian forces tighten their grip ahead of Sunday's referendum on whether to secede from Ukraine, whose interim prime minister is due to meet President Obama today.