Russia reportedly sheltering Ukraine’s president

Crimean Tatars, right, clash with police in front of a local government building in Simferopol, Crimea, Ukraine, Feb. 26. More than 10,000 Muslim Tatars rallied in support of the interim government. That group clashed with a smaller pro-Russian rally nearby.

KIEV, Ukraine — Russia scrambled fighter jets to patrol its border and reportedly gave shelter to Ukraine’s fugitive president as pro-Russian gunmen stormed offices of Ukraine’s strategic region of Crimea, deepening the crisis for the new Ukrainian government even as it was being formed.

The moves pose an immediate challenge to Ukraine’s new authorities as they seek to set up an interim government for the country, whose population is divided in loyalties between Russia and the West. Ukraine’s new prime minister said the country’s future lies in the European Union but with friendly relations with Russia.