(NEWSER) – Is Russia planning to follow up its annexation of Crimea with an invasion of eastern Ukraine? American officials say they're not sure what Vladimir Putin's next move will be, but Moscow appears to have everything in place for a potential long-term deployment, the Wall Street Journal finds. At least 50,000 Russian troops are now in position in Crimea and along the Ukrainian border, and they appear to be concealing their positions, trying to cloak their equipment, and establishing supply lines. Russia says the deployments are merely a military exercise, but Obama today told CBS News, "These are not what Russia would normally be doing." A Pentagon rep echoed that sentiment, per Reuters: "We've seen no specific indications that these, that exercises, are taking place."