Crimea referendum on joining Russia could split Ukraine up, regardless of U.S., European protests

SEVASTOPOL, Ukraine -- Less than a week before Crimea's referendum, emotions are running high. Residents of the southeast Ukrainian peninsula who want to see their region cede from the nation and officially become part of Russia sense victory is round the corner.

The U.S. and Europe say the vote -- and the Russian invasion that prompted it -- are illegal, but CBS News' Elizabeth Palmer reports that thousands of pro-Russia demonstrators on the streets of regional capital Sevastopol don't care.

"We will overcome all obstacles and restore historical justice," Crimea's interim prime minister Sergey Aksionov stood and told a cheering crowd.

Over the weekend, armed men shot at a Ukrainian border patrol plane, and they've been digging holes -- for a fence, or, according to some witnesses, landmines -- along Crimea's previously unmarked border with the rest of Ukraine.

On the other side of that border, former boxing champion and now presidential candidate Vitaly Klitschko told supporters in the Donetsk region "the main task is to unite and not allow the country to split."

But even as he spoke, the split was widening.

Ukrainian soldiers stuck on their bases, surrounded by Russian troops and other pro-Kremlin gunmen, remained right where they were over the weekend, with no sign of reinforcements coming from Kiev.

The popular movement for Crimea to become part of Russia, controlled officially by Moscow, seems to gain strength every day.